Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fab6e0eb700759c…

MALICIOUS

PDF

67.1 KB Created: 2021-03-02 00:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 43c01b24972d400e2e87a1c46694a5d8 SHA-1: ada2c3dd149ebca91212c36b38d4fcaeddbe4c33 SHA-256: 9fab6e0eb700759c8c47a8738f5373b2162f6fee67a42a46facf70a9a0b3c285
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many pointing to disposable domains, suggests a link farm or phishing lure. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with a phishing or malware distribution campaign, likely initiated via spearphishing.

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://bologen.ru/wix?keyword=aluminum+lake+docks+for+sale PDF link annotation
    • http://collegegraduatecentraldating.com/murottal_al_kahf_mishary_rashidfi034.pdfIn PDF document text
    • http://blablablacar.online/29967870352npxa8.pdfIn PDF document text
    • http://mebelintera.ru/zewekotuzepusufofigojona5ihs3.pdfIn PDF document text
    • http://paktum.pro/appvalley_android_not_workingsbx8l.pdfIn PDF document text
    • https://cdn.sqhk.co/dojatejij/bPijghO/kizifi.pdfIn PDF document text
    • http://losmopaka.site/galulemavuzefuxatemiwngdna.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/woresagomomigatomomuguniuzps4.pdfIn PDF document text
    • http://localdesign.me/data_structures_in_c_examplesbqul1.pdfIn PDF document text
    • http://yewes.fun/can_you_inflate_presta_valve_without_adapter155uy.pdfIn PDF document text
    • http://verefdliyvtorogo.xyz/65754239679b1915.pdfIn PDF document text
    • http://luminar3-download.xyz/10104895774hxp87.pdfIn PDF document text
    • http://vipadminler.org/turimekhxk0.pdfIn PDF document text
    • http://idealica-ituficiale.website/81579998113lte53.pdfIn PDF document text
    • https://cdn.sqhk.co/lutidofele/hbgi3eL/cross_dj_free_dj_mixer_app_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/okSicyv/99116482965.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/diwitapezu/82380229522.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/napegokemovexa.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/39532229996.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_off0000cb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2E 5220 bytes
SHA-256: 593416fc89981994aa8ba14c1c5c73d9c0de907fb44e9ab1f692379bc22bcbb0
font_01_sfnt_off0000dcd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD8 10312 bytes
SHA-256: 63fd3765691ec471b82a2f8a9aba0daac3d5813b07f175040a9da9d40636e162

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