Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2778a4115d56b3a…

MALICIOUS

PDF

87.0 KB Created: 2021-01-15 00:10:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 49d4c68bc5f789a16709801967b0885f SHA-1: 65ebd8128ad56a1763b15725d2ae98ea17a13ad9 SHA-256: e2778a4115d56b3aea39ad6f45259523b0b81ed4079dc268e032ef5901e6a385
244 Risk Score

Malware Insights

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

This PDF document is flagged as malicious by multiple heuristics and an ML classifier, indicating it is likely a phishing or redirector lure. It contains a large number of embedded links, many pointing to disposable hosting, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to known malicious redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=wow+affliction+warlock+guide+8.+0.+1 In PDF document text
    • https://datirelegewewat.weebly.com/uploads/1/3/4/3/134329883/sidavute_riful.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371003/normal_5f9fab36cee4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426543/normal_5f9959927988c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_5f97d30356e7b.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/ifbtIgf/77447931357.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407733/normal_5fd165a961ec2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405925/normal_5ff03f4a9b579.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403140/normal_5fe017e2bf445.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/jRjf6ib/36168965882.pdfIn PDF document text
    • https://site-1218146.mozfiles.com/files/1218146/dharma_chakram_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412388/normal_5f9cfecf4dee8.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/679953a8556.pdfIn PDF document text
    • https://site-1168078.mozfiles.com/files/1168078/dasofopivobovafe.pdfIn PDF document text
    • https://site-1193591.mozfiles.com/files/1193591/buzzer_bell_sound_effect.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE64 5484 bytes
SHA-256: 22e2e14fcab9c44069a57a62f815a9e8f979bf70ff6a6da1e9939dfafbaad96b
font_01_sfnt_off00010137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10137 11156 bytes
SHA-256: 941e60006d36ea0db0e066f07409ec67df79778de3f0fdecbac153eb839e11f6
font_02_sfnt_off00012767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12767 16712 bytes
SHA-256: 5b42675d7341838198564f0ea36d942342e2626e12c90e72e2103d9773f7d666
font_03_sfnt_off00013ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ECE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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