Malicious PDF — malware analysis report

Static analysis result for SHA-256 71098d2f1277dcea…

MALICIOUS

PDF

85.2 KB Created: 2021-04-13 09:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f6353a6dc426d5003f48e09f450c5482 SHA-1: 9fad38fecd54cd777f3a108fbf6ca4c2a396d5a6 SHA-256: 71098d2f1277dcea2da205510456bc795486bd8c54a3a980e57b2ce5f1977f83
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as legitimate content, indicating a link farm or phishing attempt. The primary URL, https://midufefew.ru/strik?utm_term=watch+the+disaster+artist+online+123movies, suggests a lure related to pirated movies. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for distributing further malware or conducting phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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/strik?utm_term=watch+the+disaster+artist+online+123movies PDF link annotation
    • http://zexorusawuwurew.sportsontheweb.net/calorimetry_definition.pdfIn PDF document text
    • https://bofanowowedo.weebly.com/uploads/1/3/4/5/134506880/6487416.pdfIn PDF document text
    • https://xigogedamexov.weebly.com/uploads/1/3/1/3/131384098/parirafirit.pdfIn PDF document text
    • http://suzupuwejal.mygamesonline.org/99042146574.pdfIn PDF document text
    • https://lefilima.weebly.com/uploads/1/3/0/7/130775934/bomulinawuvamagoguza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500889/normal_6063cfd7542fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419413/normal_60230bd27fee2.pdfIn PDF document text
    • http://luxuwum.mypressonline.com/english_alphabet_learning.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jizuvopanusin.rf.gd/sewing_machine_motor_repair.pdfIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_501b8ab7fbaf439fb3f026b0057bc4c9.pdf?index=trueIn PDF document text
    • https://765a5d72-5774-4a4d-a421-5c90307110ba.filesusr.com/ugd/f2a868_5f7c1a5a91154240882bd3ab946022ae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pipaneku/livro_de_malaquias_hernandes_dias_lopes.pdfIn PDF document text
    • https://369206df-e466-4f8f-9771-850d1edb33c5.filesusr.com/ugd/8fd5dc_e4c46648b8c9495eae8eba817d0ef523.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dupula/1801953513.pdfIn PDF document text
    • https://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_7f5ac23d30614bfaab0c01a9f9b4a22f.pdf?index=trueIn PDF document text
    • http://milasumumalun.epizy.com/babcock_university_fees.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/bexud.pdfIn PDF document text
    • http://labefarif.epizy.com/john_e_freunds_mathematical_statistics_with_applications_7th_edition_solutions.pdfIn PDF document text
    • https://5a995288-ce6f-4ae3-a3e6-14272d8003db.filesusr.com/ugd/7be1cd_3bf27292a5f44ed1afc1ba818731cf53.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/fekaterazi.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/jumexexuzumavemugarugus.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_off00010dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCF 5600 bytes
SHA-256: 0562c5e4ac97f941d94cc86172f8f9d4e7cb726cd2a04891b52b4598f78d7e6b
font_01_sfnt_off000120c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C1 11364 bytes
SHA-256: 3d0f6d6d5872ca06c6a2a3ebe6666adc0f51be75460939449fccd582362d53bf

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