Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d98a81de9d171b…

MALICIOUS

PDF

70.4 KB Created: 2021-02-24 00:30:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5c41dac1a7fbefb4201b4fb9d3598111 SHA-1: bf279d4f6e2bd4adf80dd6893498b4be60524740 SHA-256: f7d98a81de9d171b551c760d5e767580b4324093cce0101208d60a12c55a8728
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a link farm, suggesting a phishing or SEO poisoning attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the presence of numerous external URIs points towards an attempt to redirect the user to malicious sites, likely for credential harvesting or further payload delivery.

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 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://baarspo.ru/123?utm_term=samsung+galaxy+a10e+case+metropcs PDF link annotation
    • https://voximarabot.weebly.com/uploads/1/3/1/3/131383255/befanume.pdfIn PDF document text
    • https://takixesa.weebly.com/uploads/1/3/4/6/134621412/6d17b1.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/aghd9SQ/pinkfong_baby_shark_toy_vacuum.pdfIn PDF document text
    • https://ginamepi.weebly.com/uploads/1/3/6/0/136024017/04231b4084d3fef.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/fTiaawA/63652692278.pdfIn PDF document text
    • https://cdn.sqhk.co/fapiwejagiz/MiejfRT/zizonobapotijed.pdfIn PDF document text
    • http://serikanipesemo.iblogger.org/70653331957.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/welanisowari/manually_balance_lipo.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/81851787338.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/blossom_blast_saga_mod_apk_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/22752270683.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/whirlpool_induction_hob_installation_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/roblox_shaded_t_shirt_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/21948508582.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_off0000d5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F3 5720 bytes
SHA-256: 85819d9b11b6504ce28034bf3ee03fd1b8fc96608b73f0d1a685f9c8f1ad2e7f
font_01_sfnt_off0000e968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE968 10484 bytes
SHA-256: aafe51e3dad741621ff46eae22ab8daff8f1a03dfbed08fbff8ab6a4900264b2

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