Malicious PDF — malware analysis report

Static analysis result for SHA-256 4855ee829d21317e…

MALICIOUS

PDF

111.8 KB Created: 2021-06-02 12:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 46da9a11adc7cfadcb323bf4f534747a SHA-1: 517d8f46f74a00aa0ef619bed7581e5444aa1064 SHA-256: 4855ee829d21317e98f7ebecd26dd6ed295e1a3a54d05b5f742d6a377205ef68
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a link farm, directing users to numerous external PDF documents, likely as part of a SEO manipulation or phishing scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The embedded URLs and the nature of the link farm suggest an attempt to drive traffic or potentially deliver further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://catamma.ru/pbw?utm_term=aesthetic+instagram+bio+template+amino PDF link annotation
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/bisekeku-wujenixapot-pezujelovuwa.pdfIn PDF document text
    • https://kujoposa.weebly.com/uploads/1/3/1/4/131453526/2060740.pdfIn PDF document text
    • https://fewobiwagarubi.weebly.com/uploads/1/3/4/6/134628358/946b488.pdfIn PDF document text
    • https://saxonolofazejel.weebly.com/uploads/1/3/2/6/132681209/dobibojunixu_ruwome.pdfIn PDF document text
    • https://texolobalow.weebly.com/uploads/1/3/4/5/134597330/ragedi.pdfIn PDF document text
    • https://werovowota.weebly.com/uploads/1/3/4/7/134766705/bibofaga-fuguzopulova-fibazofun-pazuvaluba.pdfIn PDF document text
    • https://kuledeju.weebly.com/uploads/1/3/0/7/130775905/4228536.pdfIn PDF document text
    • https://pexefosakojoma.weebly.com/uploads/1/3/1/4/131406105/mimude.pdfIn PDF document text
    • https://buzijivugaza.weebly.com/uploads/1/3/4/7/134709386/sufokedofefu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f02e59e-8672-4c6c-af32-f964c39db4d8/vafibuxog.pdfIn PDF document text
    • http://banusiv.pbworks.com/f/49317647649.pdfIn PDF document text
    • http://bovozajezo.pbworks.com/w/file/fetch/144440943/tixoxabowijebodagif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f92f0f-2abf-4aa1-8ad5-65d262d481ce/root_word_mitosis_meaning.pdfIn PDF document text
    • http://wekibivu.pbworks.com/f/how_to_read_serial_numbers_on_trane_equipment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b000e0c7-b8cc-4d37-a6f0-23d1ac3ae2d1/dudegatujufijunujedemob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/354bb0f1-0edf-4951-ae93-c06eb8e2da3d/star_trek_enterprise_season_3_episode_15_cast.pdfIn PDF document text
    • http://zopujoxobug.pbworks.com/w/file/fetch/144413388/97026560826.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc56e06-c130-4604-a4d3-56da28b2f501/pokemon_platinum_gba_download_zip.pdfIn PDF document text
    • http://nikekuva.pbworks.com/f/ferruccio_lamborghini_and_enzo_ferrari.pdfIn PDF document text
    • http://jejosuxiz.pbworks.com/f/how_long_does_it_take_to_become_a_vet_tech_in_florida.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AF 6444 bytes
SHA-256: eb91017a6225d89fcf3d7c525f9d3adfb2c029d8d2b6d0cd9406cd0577bc758d
font_01_sfnt_off00010261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10261 4208 bytes
SHA-256: 8b7ee2f12648dc38fc896199f296121930bf5f84839333e924ca655fa53edb72
font_02_sfnt_off0001100f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100F 5476 bytes
SHA-256: a241f0ab18e8fc53408304b20a22655edaa75ddf0fcbaa60777d5ebb160f2925
font_03_sfnt_off0001228a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228A 10380 bytes
SHA-256: b823c256a2156343af8dc03c4a8e796b55e1f15925371bebb5289db6b59b3158
font_04_sfnt_off00013879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13879 2152 bytes
SHA-256: dbf7be300a21d5c114d9196983bedfb512eb15b4b622ef8ac364a4cded02d92d
font_05_sfnt_off0001418a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1418A 2700 bytes
SHA-256: b888927a9931c756a01a7e68266afd46d408637e6f778c00df9d9a6794a4acea
font_06_sfnt_off00014d3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D3F 12196 bytes
SHA-256: da3aa22d26bedd5bd2a4fd0322a1b74887fc0a5fe252874e6af1e1b07037b5a2
font_07_sfnt_off000176ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176EC 23836 bytes
SHA-256: 5551ceb93afff3774b5b985c63d4385f37038be95aed27befe2c8fe6d868effc
font_08_sfnt_off0001a483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A483 1868 bytes
SHA-256: 9263e038b85b6ff2acf5c4d0a1b0d152c4bc4dacb4a9a96f1ba5c933c84bb9e0

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