Malicious PDF — malware analysis report

Static analysis result for SHA-256 84118b3ba7aded46…

MALICIOUS

PDF

69.2 KB Created: 2020-12-02 18:23:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 652c0f4deb1ca6911491a4a4584e2e9a SHA-1: e7ea86ae602f73315d13c478f83ea2a36e3ff840 SHA-256: 84118b3ba7aded46716ad687d7c6cd7492f8dbaea14a73924584bd2c013df94b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary URL, 'https://traffnew.ru/aws?utm_term=books+about+reading+comprehension+pdf', is presented as a search result to entice clicks. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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=books+about+reading+comprehension+pdf PDF link annotation
    • https://dodafawo.weebly.com/uploads/1/3/4/6/134698388/4030802.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/bakerumorex.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/wononixuv.pdfIn PDF document text
    • https://padomixuboji.weebly.com/uploads/1/3/4/5/134527159/pavapuwirixadijatusi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487197/normal_5fbf0092b1f1d.pdfIn PDF document text
    • https://sesesisemiv.weebly.com/uploads/1/3/4/7/134746737/jedovo_zumerabifisas_wepewekula.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375197/normal_5fb5f33675722.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464072/normal_5fa4849e2a81e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388407/normal_5f8e6d7b03faf.pdfIn PDF document text
    • https://rusekawavupor.weebly.com/uploads/1/3/4/0/134096427/gexofumonu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477620/normal_5fc15b4e61a6b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/845a3229-9c1d-4d3d-b822-94412949fdd1/alaska_fishing_guide_license_requirements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd159f01-df0a-4afe-823e-b167e243fd80/31170918475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d54a17db-828a-4dc0-aa53-85cd7b5ba62b/legacy_of_discord_wrathwings_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/nadezomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74785b9c-8124-4ed6-a252-89f6afc73c34/arcade_shooting_games_ps4.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_off0000cff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF9 5792 bytes
SHA-256: 83620f70df0cd0ff4ecc75f7c1d7295ecd825fd1bba53c355ef72801f04c104e
font_01_sfnt_off0000e38a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38A 10880 bytes
SHA-256: 7b7ed08e091b22c34eae3c29221d0686db83e9f8e21080da3dec384e9373457f

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