Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8e8171576e9c20c…

MALICIOUS

PDF

75.2 KB Created: 2021-02-27 19:08:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 30d5f28f2af5e016cb4c7ecf6a879905 SHA-1: 77e0275b633ce02d4f2da902e0d6554e6b3e5703 SHA-256: e8e8171576e9c20c1a1376553c8cf706c7c97e78e945efad7c80c2bde1e117d6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=english+vocabulary+in+use+elementary+amazon PDF link annotation
    • https://cdn.sqhk.co/xoguvamev/jfjfHKx/2413823206.pdfIn PDF document text
    • http://zipogagu.iblogger.org/bivipavezukoxofere.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/0I20iaZ/78658649869.pdfIn PDF document text
    • https://cdn.sqhk.co/wularumijif/IkhhTge/the_cw_seed_app.pdfIn PDF document text
    • http://tofotibuwul.sportsontheweb.net/dewalt_dws780_miter_saw_parts.pdfIn PDF document text
    • http://lizowaw.scienceontheweb.net/how_to_get_the_relationship_you_want_rori_raye.pdfIn PDF document text
    • http://worameruvejaka.mywebcommunity.org/77898509738.pdfIn PDF document text
    • https://cdn.sqhk.co/gapebeve/gdjhDsr/fazapuzukerudilijo.pdfIn PDF document text
    • http://xekuluw.iblogger.org/personal_independence_payment_pip_application_form.pdfIn PDF document text
    • http://talebakela.iblogger.org/demonstrative_pronouns_worksheet_3rd_grade.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fukefuxatolu.epizy.com/90316190637.pdfIn PDF document text
    • http://wuparol.epizy.com/vocabulario_administrativo_en_ingles.pdfIn PDF document text
    • http://didaduxazej.epizy.com/rinutaxiselamofibizajases.pdfIn PDF document text
    • http://jitawalidi.epizy.com/jurazoxokit.pdfIn PDF document text
    • http://pazoluno.epizy.com/deriraripibodatefupamo.pdfIn PDF document text
    • http://muzasikogebew.rf.gd/boss_ve_20_vocal.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_off0000e6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C4 5524 bytes
SHA-256: af02cb1a585dd9a811eac4e75f0805117b395d50029410f655a36f16cd5811d1
font_01_sfnt_off0000f97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97D 11228 bytes
SHA-256: 8d77c737e25086f172213b2bff8a7099f12ac0aba7612b52739b3b2cc9fee299

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