Malicious PDF — malware analysis report

Static analysis result for SHA-256 8760ae68dce83c4c…

MALICIOUS

PDF

77.5 KB Created: 2021-02-21 18:21:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6198aa1fa16cdb3d6433d78064ca23f3 SHA-1: eb7c0ebebd9cf039d393a81aeec8baa0211f545a SHA-256: 8760ae68dce83c4c0d50ec668bb7cf428b037a64771da6e98515c899f17ddf47
126 Risk Score

Malware Insights

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

The PDF contains a high number of embedded URLs pointing to various domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

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 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://druttle.ru/wix?keyword=pandora+free+music+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419003/normal_5ffb422841766.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470681/normal_5ff5f69ba26d7.pdfIn PDF document text
    • http://bepelus.iblogger.org/abc_reporters_adelaide.pdfIn PDF document text
    • http://cethq.xyz/ryobi_bc30_carburetorc5ghl.pdfIn PDF document text
    • http://itanah.space/17451841523q8050.pdfIn PDF document text
    • http://passive-income.ru/solerizurod8sg9f.pdfIn PDF document text
    • https://cdn.sqhk.co/kagumuzom/1hbijzr/64195624009.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/hdNqibA/vertigo_full_movie_free.pdfIn PDF document text
    • http://drovazvenigorod.ru/72938592889trxjf.pdfIn PDF document text
    • https://cdn.sqhk.co/menigopas/8fjeO1I/jumia_online_shopping_uganda.pdfIn PDF document text
    • http://kamini33.ru/dirisipepalasegarunevuwim7bfc.pdfIn PDF document text
    • http://cloudmarket.website/69934799792b9rbs.pdfIn PDF document text
    • http://maxist.ru/mexapm2dc4.pdfIn PDF document text
    • http://buybritishcat.com/acrylic_sheet_suppliers_in_chinat4wj7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rozopujonabesix.epizy.com/cooked_sweet_potato_nutrition_information.pdfIn PDF document text
    • http://didejokor.rf.gd/26029282289.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79E 5332 bytes
SHA-256: 30e2b1a6a15286665e22902bdb8b4923cc703d7cd60c56a11d1da903b698569e
font_01_sfnt_off0000f9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AE 1936 bytes
SHA-256: 21a7146106e2ad29a4dcc6aa55cee169416400570e2b3d493b6d071cb256f2f3
font_02_sfnt_off000102f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F0 10932 bytes
SHA-256: 246c476ec192ec9258c8628df63c0e9d237b1a6f241c7560fff149332ef06a3f

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