Malicious PDF — malware analysis report

Static analysis result for SHA-256 9225beb43bf75a6c…

MALICIOUS

PDF

78.9 KB Created: 2021-06-11 20:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 688d60e33d128a9158f26f61d85d0a39 SHA-1: cc9d6f70d205d9e3b028d72abd4bb26df274f247 SHA-256: 9225beb43bf75a6caab95e0f02c26b27f8ede9751c95f779b9b208b073a1932e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, with one identified as a potential phishing lure for 'Azar app'. The PDF_SEO_LINK_FARM heuristic indicates a link farm on disposable hosting, suggesting an attempt to distribute malicious content or phish users. While no scripts were extracted, the presence of numerous external links and the ML classifier's high confidence score point towards a malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/123?utm_term=azar+app+3.+0.+4+apk PDF link annotation
    • https://pedomolakikivo.weebly.com/uploads/1/3/4/4/134440841/zimuxawabuleze.pdfIn PDF document text
    • https://gugukipibedi.weebly.com/uploads/1/3/1/4/131438190/rizajovegudip_pupipare_votereva_zatenedaw.pdfIn PDF document text
    • https://pezibufanijazox.weebly.com/uploads/1/3/4/6/134639202/506e5a43916e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471723/normal_6028c3ce80db1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458618/normal_5fe08ec4bb2f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494668/normal_5fffcd1cbb7fa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zufogopojut.pbworks.com/w/file/fetch/144488892/singapore_budget_2020_personal_tax_relief.pdfIn PDF document text
    • http://jinotofatum.pbworks.com/f/bdo_succession_pve_tier_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29e1a748-3942-42ae-a183-41d1b7d9d894/what_are_the_best_wings_at_buffalo_wild_wings.pdfIn PDF document text
    • http://papoxuva.pbworks.com/f/iphone_4s_icloud_bypass_9.3_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92671a0b-c90e-456b-b08b-47e229037522/new_orbit_sprinkler_valve_leaking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a247ac6b-2e66-484f-848b-f8f71f0d9462/5338599873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f29d74e-5ff9-4cf7-a463-7aab73d6a8a2/befefoterinudexumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7763a1f1-d1e3-4bb7-8516-19e79cc28796/delta_monitor_1700_series_leaking.pdfIn PDF document text
    • http://vedufid.pbworks.com/f/47372317677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd16a111-13ab-4d89-80dd-aa208521109b/54315876166.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_off0000ebe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE7 5132 bytes
SHA-256: 04f0537cddab27a7fa5a2969ded8b27dc351b894cc6c18a244a0103230210485
font_01_sfnt_off0000fd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD86 20412 bytes
SHA-256: 96924e8a4ff8fb6709867fc671c2a62dc40d1e0c525535de041b2a0933025cd3

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