Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ce2b4c622a884d…

MALICIOUS

PDF

84.1 KB Created: 2021-02-16 17:37:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: fe573a0c12815836214b3ee7277888dd SHA-1: 350e8a0a6c185159cc45f806ec3fd842b478c65b SHA-256: e6ce2b4c622a884d975722e8c12c2f243946c9cb95030d66e4fae5794cc093d2
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated and point to SEO-optimized content, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://maypoin.ru/wix?keyword=myitlab+access+chapter+2+grader+project+answers PDF link annotation
    • https://cdn.sqhk.co/kekelivig/jhJhjfI/maximum_carnage_snes_game_genie_codes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499283/normal_5fef048f4094a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369917/normal_5fda333a5bfb1.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/iE4X6ge/wisizabibagef.pdfIn PDF document text
    • https://cdn.sqhk.co/berovanova/CysP1ij/nimunubemibotos.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/sgjijrP/force_4g_lte_5g_4g_3g_2g_gsm.pdfIn PDF document text
    • https://cdn.sqhk.co/garisuvonuk/xjbvhe9/99270280797.pdfIn PDF document text
    • https://cdn.sqhk.co/zekafomaze/jhU1Oic/celebrity_cruises_alaska_excursions_brochure.pdfIn PDF document text
    • https://cdn.sqhk.co/mudonisogub/hMbja7Z/17120389816.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481272/normal_5ff764b4ee111.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380887/normal_6005521f6b7e7.pdfIn PDF document text
    • https://cdn.sqhk.co/suxunuke/hdggAia/homesteads_for_hope_csa.pdfIn PDF document text
    • https://dedeluruxizo.weebly.com/uploads/1/3/4/3/134305162/9561071.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381082/normal_6020b5d0307d9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/pidifunejogewobuxevunex.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/teaching_receptive_skills.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/66765036107.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/fundsmith_sustainable_equity_fund_factsheet.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000116de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x116DE 23216 bytes
SHA-256: 3f78897e7e31acb1ac1e9265a0f0ec5b19e6ee1b8811d14a641fc9ab6fcd8fb0
font_00_sfnt_off0000df48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF48 5884 bytes
SHA-256: 0e80a35123de7b5cbd5213e9b689291f85c77cf3f9cc40a283f27cbbc47c0099
font_01_sfnt_off0000f368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF368 10272 bytes
SHA-256: 7b09cd3ec61efe2ead1b839cb3114f8a5370d751dc91cd301dda564b44b3574b

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