Malicious PDF — malware analysis report

Static analysis result for SHA-256 080e679b45442c00…

MALICIOUS

PDF

92.6 KB Created: 2021-06-01 11:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 583c95a0aed13dd53069c8b6cb9d6c2f SHA-1: 50c2765c433d56de0fa744851698efb2586f1b61 SHA-256: 080e679b45442c00d333ce0a534deb964e73249f97c55fbf191999855a38118a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, with one prominent URL being https://crysiq.ru/pbw?utm_term=rbse+12th+maths+book+pdf+download+in+english+medium. The presence of a link farm suggests an attempt to manipulate search engine results or redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://crysiq.ru/pbw?utm_term=rbse+12th+maths+book+pdf+download+in+english+medium PDF link annotation
    • https://faneboluti.weebly.com/uploads/1/3/4/4/134464249/zubas-fadebula-maxomekijibo-wolinukefog.pdfIn PDF document text
    • https://rowiranuzexu.weebly.com/uploads/1/3/4/4/134436227/nogide.pdfIn PDF document text
    • https://nepajomawowezuw.weebly.com/uploads/1/3/4/4/134462508/4ee227aaa78.pdfIn PDF document text
    • https://vigegenatiborig.weebly.com/uploads/1/3/0/7/130740049/gasiluxitudev.pdfIn PDF document text
    • https://fozapiko.weebly.com/uploads/1/3/0/9/130968993/toriweludoxoju_jodivujoda_radupo_jetabuv.pdfIn PDF document text
    • https://fivefijoxiwu.weebly.com/uploads/1/3/1/4/131453543/rufefivogufowuluv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://xutosop.pbworks.com/f/cuanto_equivale_1_metro_en_pies.pdfIn PDF document text
    • http://kibumezi.pbworks.com/f/lifikapogunexaduwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6787454e-d2f3-40ae-a149-beb7f382b2d8/longman_english_grammar_exercises_with_answers.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/f/72117651658.pdfIn PDF document text
    • http://bovojigu.pbworks.com/f/79832252368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a61c5e65-e39f-4ddc-a5a7-61d59156e529/how_much_does_a_honda_shadow_1100_weight.pdfIn PDF document text
    • http://niwomif.pbworks.com/f/engineering_materials_properties_and_selection_9th_edition.pdfIn PDF document text
    • http://dewubuk.pbworks.com/f/midodametak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fe5e3e3-fc1e-43c5-917f-ae047c839cfd/do_i_need_a_crib_or_can_i_use_a_pack_and_play.pdfIn PDF document text
    • http://fadoposapat.pbworks.com/f/9969225117.pdfIn PDF document text
    • http://faxamom.pbworks.com/w/file/fetch/144450978/kezanogozopogafalojuwotuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90a6343b-1c91-4d24-8170-63cb4e971411/10827908266.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC45 5728 bytes
SHA-256: 65778f9d31fd657a2e5a42e3f541c456fde05ee78a1111ee8d3fb6ec0e7b6d3b
font_01_sfnt_off0000ffaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAF 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off00010b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B12 10584 bytes
SHA-256: fba568b4814fc2bdf67af4f7753472e70fff49b66a97a83b2cab38629efb4854
font_03_sfnt_off00012f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F3A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
font_04_sfnt_off00013d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D3A 12636 bytes
SHA-256: 0b657f910ba71484ac13def8f1216f338bfc3076fc2277a084038e243dd50d24

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