Malicious PDF — malware analysis report

Static analysis result for SHA-256 7da891b9391e79e2…

MALICIOUS

PDF

76.2 KB Created: 2021-04-05 03:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6d85ac24e19bfeed26a0b3a16f7c4d95 SHA-1: 19b624372ccd70d4bd6220ce04c0a2f9c46b7c4e SHA-256: 7da891b9391e79e2c9a805d57b7a6f9ec8a81cb8051fcd01eb224189585e341d
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 0.9991

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://xezojetit.ru/aws?utm_term=when+ps5+will+release+in+india PDF link annotation
    • https://tamoniwezetiro.weebly.com/uploads/1/3/5/9/135961995/dopevedorom_fokazegojimekex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484365/normal_60644a45ea07b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454543/normal_5fff97faacfed.pdfIn PDF document text
    • https://lebuwaner.weebly.com/uploads/1/3/4/4/134478239/legaxuraxuwon.pdfIn PDF document text
    • http://claire-irk.ru/the_last_lecture_kannadac837g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421336/normal_5fd1c31d90108.pdfIn PDF document text
    • http://litvinenko.xyz/xojawaxiropulur6wn7i.pdfIn PDF document text
    • http://soldatskaya6.ru/prime_video_android_tv_apk_mi_boxmj4hx.pdfIn PDF document text
    • https://defelidiko.weebly.com/uploads/1/3/1/0/131070982/pinepozeb-xakirigile.pdfIn PDF document text
    • https://fabupegux.weebly.com/uploads/1/3/4/6/134689396/6514153.pdfIn PDF document text
    • http://inostrana.com/bedsheets_online_buy7at0w.pdfIn PDF document text
    • http://sell-toclick.online/the_demon_king_series_book_3au802.pdfIn PDF document text
    • https://venowogofopow.weebly.com/uploads/1/3/4/6/134611371/b3df4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374986/normal_5fd9797178736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491705/normal_606a53e057351.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445340/normal_5fd7c464dc57b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424400/normal_6029032969f93.pdfIn PDF document text
    • https://nazorokofewedu.weebly.com/uploads/1/3/2/7/132710677/2183303.pdfIn PDF document text
    • https://rofubedojatedo.weebly.com/uploads/1/3/4/5/134586725/8362117.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/228847c1-bd80-428c-b8fd-60032d649c7b/nigelerivelutiwukiruw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/689f6e1f-2a64-4bf9-933a-dde089af7672/tintin_book_sri_lanka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d677b961-3ff2-487b-a841-1d6ab525f8e4/37379841726.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30f19e83-4483-40d7-b59d-cc874156bff6/54707037651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/959f0f4c-54ca-456b-bbfc-65b04e788cfa/wubemugekive.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_off0000ed3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3F 5276 bytes
SHA-256: 208c474e45622a3069239a0561b5cfe4f9e89a0575bc81924bed56b122313060
font_01_sfnt_off0000ff44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF44 10388 bytes
SHA-256: c3ba34b9279432ec3354fed80b33018a22910f06ea29ccddf493c14c4d3613bc

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