Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eed8e7cf9011725…

MALICIOUS

PDF

74.1 KB Created: 2021-01-23 17:52:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: fa298775cb1595887ae0a8360660b59b SHA-1: 9aa30c4d1138704b5597f5c45659d08175452eb0 SHA-256: 2eed8e7cf90117253e829fb788f2000ee5c69139b29d9250025744301490ceca
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicating a link farm designed to drive traffic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/aws?utm_term=quotation+marks+worksheets+with+answers PDF link annotation
    • https://site-1261932.mozfiles.com/files/1261932/schwerbehindertenausweis_antrag_rlp.pdfIn PDF document text
    • https://site-1168215.mozfiles.com/files/1168215/kapofita.pdfIn PDF document text
    • https://cdn.sqhk.co/xusorawoka/iathfCX/dino_hunter_deadly_shores_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426819/normal_5feb16887a227.pdfIn PDF document text
    • https://cdn.sqhk.co/seseniluvus/hhehagf/castle_clash_regu_royale.pdfIn PDF document text
    • https://site-1177523.mozfiles.com/files/1177523/great_cupcake_recipes_from_scratch.pdfIn PDF document text
    • https://cdn.sqhk.co/luxixumogez/higgWjh/reuters_news_us_election_results.pdfIn PDF document text
    • https://site-1174988.mozfiles.com/files/1174988/6622560490.pdfIn PDF document text
    • https://basavorulifa.weebly.com/uploads/1/3/4/8/134899730/cd15254d1f1.pdfIn PDF document text
    • https://cdn.sqhk.co/moviferu/cheigiV/rolling_stone_top_500_classic_rock_songs_list.pdfIn PDF document text
    • https://site-1171987.mozfiles.com/files/1171987/effects_of_tramadol_abuse_in_ghana.pdfIn PDF document text
    • https://site-1174578.mozfiles.com/files/1174578/zig_zag_stripe_coupon_code_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/vemudumuxixu/ieWwEgd/kikivelafodupefebowopi.pdfIn PDF document text
    • https://site-1177991.mozfiles.com/files/1177991/68840927125.pdfIn PDF document text
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/489398.pdfIn PDF document text
    • https://site-1166655.mozfiles.com/files/1166655/3292901717.pdfIn PDF document text
    • https://zomuguwiremadak.weebly.com/uploads/1/3/1/4/131406071/5ead4.pdfIn PDF document text
    • https://site-1166704.mozfiles.com/files/1166704/lords_mobile_hide_online_coins_and_gems_generator.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://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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B7 4992 bytes
SHA-256: 9d63fe499f0dd458cfabd6c938eb93f773e7e8528173e4a25d21c49dd2c97980
font_01_sfnt_off0000e98e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98E 10324 bytes
SHA-256: d2259e3ac3ff0f6843159d97d47006d4040584c34af8084b19a678c7e95249b2
font_02_sfnt_off00010c8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378