Malicious PDF — malware analysis report

Static analysis result for SHA-256 66aede444e730f64…

MALICIOUS

PDF

81.9 KB Created: 2021-03-31 18:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 06f9adb252904065410cba2730ad2116 SHA-1: 50e91b4c26928ad57a79fca370b170fffe1c9539 SHA-256: 66aede444e730f64540b9c9d309b57dec1bd1c7ae120b2fe403776bd9a863ae1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9993

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://xajibur.ru/strik?utm_term=casio+g-shock+classic+ga-150-1aer PDF link annotation
    • https://cdn.sqhk.co/ribobujir/jjfnibP/temuxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481065/normal_60071289db6ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489414/normal_5fcf5fd910e1a.pdfIn PDF document text
    • https://cdn.sqhk.co/daposofoxig/agihcY0/98414398611.pdfIn PDF document text
    • https://nolomiwasuwizug.weebly.com/uploads/1/3/4/6/134661688/2663380.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460449/normal_604e988227cf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417536/normal_602f0cb812cc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486193/normal_5fd332c564e2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427313/normal_5fd636c510b55.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwopazeg/cQjbYjb/guides_gamepressure_rise_of_the_tomb_raider.pdfIn PDF document text
    • https://rigawegafo.weebly.com/uploads/1/3/4/5/134587157/635ac51fd1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405922/normal_5fca12b36dbbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500904/normal_60535736056f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453540/normal_60523586c0fbb.pdfIn PDF document text
    • https://cdn.sqhk.co/daladovum/c2siihb/birding_asia_journal.pdfIn PDF document text
    • https://xemakoxen.weebly.com/uploads/1/3/4/3/134320116/wudavubedibebom_fovonunab_rudovifore_farapipusira.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483361/normal_5fd1c4b96e74c.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/sefipa/online_boy_scout_merit_badge_classes_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/zupexifeberujowumupo.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/dovojo.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/41065028298.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/irritable_bowel_syndrome_with_diarrhea_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/govaresolumitiliroxumekoz.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/katoxirexafeg.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/why_cant_i_move_my_desktop_icons_windows_10.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001027f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027F 5380 bytes
SHA-256: f44a60d68c782810677a8eec85e4486ba917c4ed226b97405665922fc59051ff
font_01_sfnt_off000114cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CF 10436 bytes
SHA-256: 8cf2b3f1c3d42c728e6971bdf0a490433b5365a68aa3f03b5d5ed9d6bd063561

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