Malicious PDF — malware analysis report

Static analysis result for SHA-256 a501f53a1120dfd5…

MALICIOUS

PDF

71.6 KB Created: 2021-02-15 11:39:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 53d5d541c8c26f8149d9b12d24966762 SHA-1: b3b3b2a2f6edc04e6b6a048cd9c62eaa8a9cec70 SHA-256: a501f53a1120dfd5cbdcf0b279125b1971883a2e6c6ff87055d193226feac824
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://baarspo.ru/strik?utm_term=example+of+motion+sensory+details PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4487927/normal_5ff2b050020c9.pdfIn PDF document text
    • https://dabamupusoga.weebly.com/uploads/1/3/4/2/134265366/a03abcc699c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455403/normal_5ff92652b0917.pdfIn PDF document text
    • https://nemusadepupozug.weebly.com/uploads/1/3/1/4/131453027/wodug.pdfIn PDF document text
    • http://copyright-notice-ig.com/sepibuworerjr6a.pdfIn PDF document text
    • https://kosilamegorigi.weebly.com/uploads/1/3/1/4/131409210/koxitotafobitax-sevabinimuwaz-kenotativesu.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/jagcdib/43680558210.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421960/normal_5fe2db06622ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491673/normal_5ff018b186452.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421778/normal_5ff869e26f843.pdfIn PDF document text
    • http://7gusevshop.website/73810283896piib5.pdfIn PDF document text
    • http://daliadiago.com/7204718250xg0c1.pdfIn PDF document text
    • https://wisamifogafize.weebly.com/uploads/1/3/4/5/134598642/b15eb2ed3922.pdfIn PDF document text
    • http://poradoit1.site/word_swipe_pic_puzzle_downloadsvpnq.pdfIn PDF document text
    • http://wordsidepost.top/calendar_weekly_template_2018s216g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374708/normal_6025e3690e0a5.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/iOhdOjd/cross_stitching_supplies_calgary.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366369/normal_60039046e9c01.pdfIn PDF document text
    • https://cdn.sqhk.co/ribobujir/heIGjiJ/50199631145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451033/normal_601afc7fd6641.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453719/normal_600d350465fcd.pdfIn PDF document text
    • http://bitsracing.net/napuzilesrm8wj.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/f9gdljc/foundations_early_learning_center_simpsonville_sc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000da7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7A 5316 bytes
SHA-256: bd57429ba7affd848a585633209994e83f4ed043a87c740d8a0ba57cb127421a
font_01_sfnt_off0000ec8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8A 10756 bytes
SHA-256: 65f9d85ab1ea7126ad08d2f87bab3fa888d4bb9be2c02752543391d80e1e1564

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