Malicious PDF — malware analysis report

Static analysis result for SHA-256 78a0251231837852…

MALICIOUS

PDF

78.1 KB Created: 2021-02-21 14:59:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: abd7d2220e2a7f9bb838631e4921cda1 SHA-1: 97e8fb1e8131a0a4b24d09bfc5fb77cd9271dc69 SHA-256: 78a0251231837852deb0561c4ae0191ebe4105a95309db57cb529b1a41e093e4
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 0.9996

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://leonvi.ru/123?utm_term=how+to+replace+battery+in+toyota+corolla+remote PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470221/normal_5fec04704c162.pdfIn PDF document text
    • http://damvglaz6.xyz/99717277494rskd5.pdfIn PDF document text
    • https://nixodogal.weebly.com/uploads/1/3/0/7/130739919/zidasedejeze_bofisiduga_bomoje_fobepisuvaza.pdfIn PDF document text
    • https://meligobuv.weebly.com/uploads/1/3/1/0/131070858/ff61212af39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471455/normal_600174164c09b.pdfIn PDF document text
    • http://rovepofaji.22web.org/69882748738.pdfIn PDF document text
    • http://doorstepcomputers.com/vexivitibersu.pdfIn PDF document text
    • https://suwudaxodorepe.weebly.com/uploads/1/3/4/8/134885248/90727.pdfIn PDF document text
    • http://fimewot.xyz/behavioral_neuroscience_textbooknhohs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_60177aa8a338f.pdfIn PDF document text
    • https://dugigezulafi.weebly.com/uploads/1/3/4/8/134898894/jatelotis-xuvuvipodet-padozipefibuta.pdfIn PDF document text
    • https://tidosivapozagul.weebly.com/uploads/1/3/4/3/134390518/1759336.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501495/normal_5fdc0f969ad45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374537/normal_602960bed46b3.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/bisute/70540710053.pdfIn PDF document text
    • http://topufopotu.epizy.com/nigerian_naming_ceremony_outfit.pdfIn PDF document text
    • http://munoxefarofow.rf.gd/fire_retardant_plastic_sheeting_white.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/conserving_biodiversity_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/37437815410.pdfIn PDF document text
    • http://zoforex.rf.gd/33248838139.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/alton_towers_map_2018.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84B 4984 bytes
SHA-256: 1b755096b74d8ffeb04fae5107c9be3c02b4b1007d40a0820617e4b3da78b1fa
font_01_sfnt_off0000f92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92A 10192 bytes
SHA-256: 458028ccc9d678cf0aa25c242ddc290177a6d5d9fcb15bfff2c43340fa42b46c
font_02_sfnt_off00011c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C14 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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