Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f427f7b7cc80a48…

MALICIOUS

PDF

77.0 KB Created: 2021-04-04 19:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6e2c0db1ac2988eafa0b634b54be6d95 SHA-1: 717510dcbfc0dc0112e56bb86cb0d84d8dccc1ea SHA-256: 2f427f7b7cc80a48f22b700e0ef8d22ee45d6b4296c7baaed1ff02823da92e36
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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 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://jottigo.ru/wix?keyword=ancient+roman+house+gods PDF link annotation
    • http://potenciy.xyz/46155037649uj2dj.pdfIn PDF document text
    • http://capridigi.com/sasufikoxitozupusiforalu5sv1c.pdfIn PDF document text
    • http://cancandance.org/best_free_flowchart_applicationsrw4zk.pdfIn PDF document text
    • http://normal-id.com/1537476668bfq9c.pdfIn PDF document text
    • http://vegixojarek.iblogger.org/james_baldwin_the_fire_next_time.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464530/normal_5ffb662b7581b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413113/normal_6067dda626dd1.pdfIn PDF document text
    • http://verifiedbadges-form.com/184512049107knz4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473388/normal_604881f58bd74.pdfIn PDF document text
    • https://cdn.sqhk.co/pomorezolo/cX0ibhd/yeezy_350_bred_restock_2020.pdfIn PDF document text
    • http://barojenixumaja.iblogger.org/stevens_320_security_pistol_grip_review.pdfIn PDF document text
    • https://cdn.sqhk.co/dulinifijal/rRNjfha/nikukalikaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461249/normal_6006007466d7f.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/hiRt3nW/jibamafikum.pdfIn PDF document text
    • https://cdn.sqhk.co/samanugutu/AhjhhnM/babojumeruzino.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/bisiku/encyclopedia_of_general_knowledge_free.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/42502262297.pdfIn PDF document text
    • http://wilurimidolajej.rf.gd/xufavidujaro.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/45445704920.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/48970131862.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF029 5312 bytes
SHA-256: f83c7dd7fb8ada7a631ab9221035886e2bc66d68b14d28a69718f09dce317452
font_01_sfnt_off00010206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10206 10892 bytes
SHA-256: 11621cad6a18027f4cb97f5e591344a20efe098aaf0407861c7cbcb4d7302b1e

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