Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce651ecd16e3ded9…

MALICIOUS

PDF

81.2 KB Created: 2021-04-23 23:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 46f9be20595b46a1cf41aedf41c14365 SHA-1: 88dc5f11414ecd732031deb3e59184b071598087 SHA-256: ce651ecd16e3ded9d7a5e8ccdaa9f278a0ba5b95b1b11015ca83f2fcdbae717a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://vilenefex.ru/strik?utm_term=carl+rogers+therapy+techniques PDF link annotation
    • https://fulopovesaj.weebly.com/uploads/1/3/0/7/130740112/fukudewubiguxek.pdfIn PDF document text
    • http://shop50off.info/is_there_going_to_be_a_new_star_wars_movie_in_2021t9tu3.pdfIn PDF document text
    • http://rijigikesezaga.mypressonline.com/73137750772.pdfIn PDF document text
    • http://bubble1.space/barras_de_access_en_espaolxqf80.pdfIn PDF document text
    • http://tideboweped.medianewsonline.com/geriwis.pdfIn PDF document text
    • https://bukiwajomudaf.weebly.com/uploads/1/3/4/4/134437050/6232419.pdfIn PDF document text
    • http://tadugebakonuged.getenjoyment.net/components_of_functional_foods.pdfIn PDF document text
    • http://perfectiona.online/anaconda_2_tamil_movie_hollywood10mu9.pdfIn PDF document text
    • http://retamos.mygamesonline.org/pdf_alternator_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://13006a6e-9b3f-4191-9e3f-064114488741.filesusr.com/ugd/34464a_d2cf7bb2df2540558f294fdd58f9c04d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2216ffa3-c133-42a8-a917-ff26f6b238b1/defefeka.pdfIn PDF document text
    • http://vubelifijam.atwebpages.com/free_download_complete_holy_quran_with_urdu_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/gaali_chirugaali_song_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/958758af-e472-4f65-80c4-e86e0704d51a/45755842405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3342736-3095-46fa-87fa-bf5de07e6c2a/xonupixududufusuladu.pdfIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_707786c839be46109f02e3ba95a0f580.pdf?index=trueIn PDF document text
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_e1d764f831ff429fb8b229e70f24cdbb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/bunker_delivery_note_template.pdfIn PDF document text
    • https://abbf68a8-5b21-4996-91be-11266bd273ed.filesusr.com/ugd/9374a7_4242198343494baca4b6f458cb8dbd70.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4ce3aaa-048f-40ed-800b-f02425d407e0/what_does_margin_of_safety_in_business_mean.pdfIn PDF document text
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_47c356724c37451eac6bd3f17782c167.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ece1e444-56fc-4c5f-99b0-b3f3a003627a/are_firex_and_kidde_compatible.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/jajol.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10229 5328 bytes
SHA-256: 527ec7d50ef4919a158d1e2534e9c87396b06d89500cbf9db1715d158e3ced14
font_01_sfnt_off0001144d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144D 10452 bytes
SHA-256: 72de0844b835ce977db66cc3414fcf397aa75db8eb6e520527f716aafeea09fe

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