Malicious PDF — malware analysis report

Static analysis result for SHA-256 d210308b8ad63b87…

MALICIOUS

PDF

77.1 KB Created: 2021-02-27 19:48:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 77ed64b4d28274bd2072db33ee11810b SHA-1: 80c0788004587e02d29102377d0db2a37b02c39e SHA-256: d210308b8ad63b87e57ad09f5850230e977a812b2b9840264bf6572a9db81479
136 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The embedded URL `https://nipisod.ru/strik?utm_term=how+to+assemble+mainstays+bathroom+space+saver` is identified as a redirector for free-download phishing. ClamAV also detected this file as a phishing trojan. No scripts were extracted, but the overall pattern suggests a phishing attempt disguised as helpful content.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://nipisod.ru/strik?utm_term=how+to+assemble+mainstays+bathroom+space+saver PDF link annotation
    • https://s3.amazonaws.com/pogolo/42623921099.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/selenium_automation_testing_interview_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/87907665789.pdfIn PDF document text
    • https://cdn.sqhk.co/wugotiparo/5hahgUS/knife_smash_hits_song_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486751/normal_5fd276f50db5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495707/normal_601ff7ac01725.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388276/normal_602c8fe4edfbd.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/58327442774.pdfIn PDF document text
    • http://expressday.online/467918297936l56z.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/hfqqAFH/77140175233.pdfIn PDF document text
    • https://cdn.sqhk.co/kewixoretuze/jaV0ijL/44481264187.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426269/normal_60017e01e8abd.pdfIn PDF document text
    • http://fokagud.iblogger.org/vampire_diaries_fanfiction_damon_and_stefan_lemon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411491/normal_5fdbb04ab1cd6.pdfIn PDF document text
    • https://cdn.sqhk.co/nakijalufiw/Bvicjh6/79696756732.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375708/normal_5fe05837a0454.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385197/normal_601bb3d3e52d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_60265745496ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ef04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF04 5528 bytes
SHA-256: d29d79aff8b40afe199461937bd5506139e91911caf886bc8a4f72d59e0d2fc5
font_01_sfnt_off000101b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B7 10832 bytes
SHA-256: 972f9fbd6dafd47abf6dc2411a9e5f7b17b5ebe4b618ff75ac231ff2e335c302