Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae1986cf5deda10…

MALICIOUS

PDF

79.9 KB Created: 2021-05-09 03:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 32d8b77e4540f360a98525092afcb2ce SHA-1: 9ff4185da7b8c6a97467f01b3e7a28a80b94a2e0 SHA-256: fae1986cf5deda10b5decdd05128c79cae29b0e1b0aac05a5a7ed501c68f852f
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://dugedepap.ru/strik?utm_term=marine+corps+marathon+training+plan PDF link annotation
    • https://zevenaxef.weebly.com/uploads/1/3/4/7/134745307/padifob.pdfIn PDF document text
    • http://mukovasisoro.mygamesonline.org/anne_bradstreet_the_tenth_muse.pdfIn PDF document text
    • https://cdn.sqhk.co/fezavomol/2genAhj/polite_magic_word_crossword_clue.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/fjb4Yha/pupepafomaridujer.pdfIn PDF document text
    • https://cdn.sqhk.co/kofuvufexo/0jdjbe1/gomixodetofodepusugu.pdfIn PDF document text
    • https://cdn.sqhk.co/mekerijiwuv/DRvja6X/79359157517.pdfIn PDF document text
    • https://cdn.sqhk.co/mesafovojifo/Rhggfhf/how_to_write_a_business_proposal_example.pdfIn PDF document text
    • http://giwitijudaleka.mygamesonline.org/60677057258.pdfIn PDF document text
    • http://luzofogobud.22web.org/1617478472.pdfIn PDF document text
    • https://cdn.sqhk.co/pogadidotilu/HHDkhbZ/lifanegi.pdfIn PDF document text
    • https://cdn.sqhk.co/jilebodetifa/G31TgcZ/76930109877.pdfIn PDF document text
    • http://storedubai.shop/2066774272ifuxa.pdfIn PDF document text
    • https://robesiladobaluj.weebly.com/uploads/1/3/0/8/130813577/fb8253e305433c6.pdfIn PDF document text
    • https://zemotoru.weebly.com/uploads/1/3/2/6/132695551/sademasekewebugudifa.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/jhQJbic/glee_songs_hopelessly_devoted_to_you.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/7mgju6I/22589414706.pdfIn PDF document text
    • http://tehnopolis.org/52491487179drj35.pdfIn PDF document text
    • http://xenakasewexibal.sportsontheweb.net/88242571793.pdfIn PDF document text
    • https://febodume.weebly.com/uploads/1/3/2/8/132815732/vuxaje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuluwaf.rf.gd/84659849237.pdfIn PDF document text
    • http://tikinupuworate.rf.gd/diagnstico_empresarial_sebrae.pdfIn PDF document text
    • http://bunebuka.rf.gd/enuresis_treatment_guidelines.pdfIn PDF document text
    • http://wewopok.epizy.com/char-broil_commercial_tru-infrared_stainless_black_4-burner.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_off0000f718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF718 5352 bytes
SHA-256: 9d930cce20559f2f38ce90721c3bebb9dfb995e6f7ba22a54d68f56cb4caf2b1
font_01_sfnt_off0001092a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092A 12264 bytes
SHA-256: 92927514d8aed14a3397f443081102515c89a7c6695464c7740851ac213d7b71

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