Malicious PDF — malware analysis report

Static analysis result for SHA-256 8571d4add1dba51f…

MALICIOUS

PDF

76.3 KB Created: 2021-01-10 08:18:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 61496ec8cada78fa72a280eded75afdc SHA-1: eb0cfeb22afba8c93d0d99c3b497f8e4b33cd59e SHA-256: 8571d4add1dba51f40bb3bff2ff2d2b8730620fe651cf13c9f02b2321fd7029d
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The document contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO manipulation tactic. One embedded URL, 'https://traffking.ru/123?utm_term=donut+county+trophy+guide+and+roadmap', indicates a potential phishing or scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/123?utm_term=donut+county+trophy+guide+and+roadmap PDF link annotation
    • https://site-1203881.mozfiles.com/files/1203881/63134370639.pdfIn PDF document text
    • https://site-1174627.mozfiles.com/files/1174627/63439476008.pdfIn PDF document text
    • https://wuxinaruniluxod.weebly.com/uploads/1/3/4/8/134882591/6160599.pdfIn PDF document text
    • https://site-1178187.mozfiles.com/files/1178187/pokemon_go_community_day_november_2020_date.pdfIn PDF document text
    • https://site-1177484.mozfiles.com/files/1177484/mixijadazul.pdfIn PDF document text
    • https://delazodudiz.weebly.com/uploads/1/3/4/5/134591817/sesizowozu-talepetolus-bidavixitupi.pdfIn PDF document text
    • https://vuzaruluweketex.weebly.com/uploads/1/3/4/4/134478477/5384609.pdfIn PDF document text
    • https://site-1178309.mozfiles.com/files/1178309/ice_cream_cake_baskin_robbins_indonesia.pdfIn PDF document text
    • https://pekiwuvigefarov.weebly.com/uploads/1/3/4/7/134766825/7604966.pdfIn PDF document text
    • https://wotigutaz.weebly.com/uploads/1/3/4/3/134361511/kebafezuginedos.pdfIn PDF document text
    • https://site-1174531.mozfiles.com/files/1174531/hbo_max_roku_channel_code.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/fedufiporara/amazon_music_genre_list_alexa.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_off0000eb8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8B 5376 bytes
SHA-256: 821d2e4bd419df98a2501e9be2e5aaeca41615f5ccbeee4e6191e3bc8ea4f09b
font_01_sfnt_off0000fdb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB8 11456 bytes
SHA-256: 350ea0b95ec99e6c1c0a987150d434f5ed15546e807efbb98626d7c7ca0d4d33

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