Malicious PDF — malware analysis report

Static analysis result for SHA-256 1432204451662738…

MALICIOUS

PDF

73.2 KB Created: 2021-02-22 19:39:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c72f0e9b9536fd7e559673dc4ccf0b6b SHA-1: 93c83fe1c7f28f0728ab47e88b318985b8acac51 SHA-256: 14322044516627388d938310ebbf1c40b438d5bcfad221187ba0ca0d9118998b
156 Risk Score

Malware Insights

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

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 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.
  • 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://crophysi.ru/123?utm_term=best+stargazing+app PDF link annotation
    • http://nutejujaxi.66ghz.com/string_interpolation_c_format_date.pdfIn PDF document text
    • https://cdn.sqhk.co/bomoxale/Xn1M0ii/48904037842.pdfIn PDF document text
    • http://cardio-active.site/kifaxaxixulitemojoravaru51sun.pdfIn PDF document text
    • http://itabody.space/tukunegaginivumepowowajjdpgf.pdfIn PDF document text
    • https://cdn.sqhk.co/gazejuruni/jjjgSje/call_of_duty_warzone_xbox_one_size.pdfIn PDF document text
    • https://davabodijesofid.weebly.com/uploads/1/3/4/4/134474123/7bbc198.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/egeJjdR/88380901195.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/fidSibj/nojolugoxitototiseturake.pdfIn PDF document text
    • https://cdn.sqhk.co/zedazisem/prjgjeo/77652500957.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/kukazowox/candy_crush_game.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/chemistry_heterocyclic_compounds.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/kohler_bathtub_faucet_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/wanenusudivujupuwogorune.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/dawes_touring_bike_size_guide.pdfIn PDF document text
    • http://jidovuvidugotuw.rf.gd/2264265279.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/dixuwojezerujixag.pdfIn PDF document text
    • http://joveteki.epizy.com/respironics_remstar_system_one_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/aplikasi_anonytun_untuk_iphone.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_off0000e254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE254 5056 bytes
SHA-256: de372cccea7f1f7bbcf218de2726df5739e354326637aed8151bf470a1742991
font_01_sfnt_off0000f3a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A4 10504 bytes
SHA-256: e4971052169d8933549f709200ba5ea91e29a54133c6fea944d0e441127986cf

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