Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a179807e90ed32…

MALICIOUS

PDF

75.3 KB Created: 2021-01-04 19:34:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ab8c10ba9b6b5ede1d61f7ab5953c8f3 SHA-1: 2cfc9c45762dd56cf7464d7e299a2ed37ebbdf17 SHA-256: 34a179807e90ed324ca3b93609a7e58d073b8e53a1d62d632867f09ab262154f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. The primary URL, 'https://traffnew.ru/aws?utm_term=singular+and+plural+nouns+sentences+worksheets', suggests a lure related to educational content. The presence of multiple external links and the ML classifier's high confidence score indicate a malicious intent, likely to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffnew.ru/aws?utm_term=singular+and+plural+nouns+sentences+worksheets PDF link annotation
    • https://widijozitumude.weebly.com/uploads/1/3/4/6/134688085/4173627.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380882/normal_5fbae5211ccc5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393508/normal_5fc91b261c2cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370266/normal_5f89266cc0e4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459163/normal_5fc4de2954a16.pdfIn PDF document text
    • https://tipowunukal.weebly.com/uploads/1/3/4/3/134355136/boteja-bimurukevudibad-suxexitimu-jidokimuvav.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
    • https://s3.amazonaws.com/gogoxowiniza/verbal_analogy_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7f9e40d-73be-4122-9a66-926cd1e3f5a5/relative_velocity_practice_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/011d87ba-ef1a-448e-a4bd-9db8e456dc51/gounod_pater_noster_ed._rigaudiere_s.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/sekokaxazemetasutebubigak.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/vebavipadedobov.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/brave_vs_chrome_android_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/96189716273.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0654772-c08a-40ff-beec-93c9641ddefb/zofarunenex.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 3

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC39 5476 bytes
SHA-256: 40497e36bf8e898b25bde1ffebceccf6f6238351e4cfe04a478dba807de63c23
font_01_sfnt_off0000eed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED8 10204 bytes
SHA-256: d68123210c1b7036bc0f22839c102781fcad8b277e75d1ef9622c1cfd3303cbc
font_02_sfnt_off000111c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C9 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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