Malicious PDF — malware analysis report

Static analysis result for SHA-256 1450b57452a5fabe…

MALICIOUS

PDF

70.9 KB Created: 2021-06-10 10:34:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 950a299f15541345c67c3755d2082193 SHA-1: f99310461ed8435f3e88b0c98fe713773185a5cf SHA-256: 1450b57452a5fabe479e977e31baa88f0f28de6666af933f3314a25d754c7fb1
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 0.9998

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://krisoc.ru/pbw?utm_term=stick+pool+club+hack+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405930/normal_6044679137f24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426954/normal_5fdebfee1d078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385010/normal_60ba0cd97d41a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376600/normal_60c196aa06711.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446765/normal_5fe2571547b2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485822/normal_606e9579c89e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444356/normal_6016d40e064eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484114/normal_5fca5cb2df35f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kokoxudalux.pbworks.com/w/file/fetch/144809541/adding_subtracting_rational_expressions_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e70a2672-3fb1-48a1-bc96-e3bacc9c7afc/how_to_change_from_c_to_f_braun_thermoscan_6022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91236fa6-e253-4747-b02f-55cdf60ff5da/3896859460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2d9542c-ae2e-418e-9735-0e2852340ab7/kemazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d464115-1694-4af2-a18b-3af4c06a50e6/5353741334.pdfIn PDF document text
    • http://tusawijer.pbworks.com/w/file/fetch/144449451/gerelulogexe.pdfIn PDF document text
    • http://xobapotowi.pbworks.com/f/45510631596.pdfIn PDF document text
    • http://zepadatoju.pbworks.com/f/is_tracfone_iphone_unlocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56a955a4-0833-4805-b065-3653f4f3187b/98284157844.pdfIn PDF document text
    • http://gabekujijud.pbworks.com/w/file/fetch/144546078/rainbow_six_siege_charms_amazon.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_off0000d9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C7 5052 bytes
SHA-256: 7a15cbdadece3ab15556ef486b718805d0c3052161c232753ee39e33ac4f029f
font_01_sfnt_off0000eafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFA 10464 bytes
SHA-256: c13e00658deff9f20cb0b66d39cfa5856a6e4496249aad08a582064548db7f61

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