Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a18834444bc211d…

MALICIOUS

PDF

81.0 KB Created: 2021-03-30 01:30:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 0e7f4ea02c8156051043428a049181a0 SHA-1: bc4d4fa2e5cfd049e717ae43d4d0ffbc58389c8f SHA-256: 2a18834444bc211da06c0212ec651efbc8bbf0b2f594a0841c2e439269deefe6
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. It contains numerous embedded URLs pointing to potentially malicious or disposable domains, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains metadata related to its creation, which does not directly reveal the attack's purpose but supports the overall suspicious nature.

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 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://botokaw.ru/wix?keyword=micro+motion+mass+flow+meter+manual PDF link annotation
    • http://reduslim-ufficiale.website/10497493772ts8xp.pdfIn PDF document text
    • http://arfesopt.com/90527826743nztxs.pdfIn PDF document text
    • http://chambre.xyz/bible_study_lesson_plansrvkrj.pdfIn PDF document text
    • http://abanca-electronica.com/12386073610d5tdy.pdfIn PDF document text
    • http://zevupixikug.mywebcommunity.org/60427950234.pdfIn PDF document text
    • https://sufevibuxaka.weebly.com/uploads/1/3/2/7/132712301/nexel.pdfIn PDF document text
    • http://winnerslm.space/58488000495iw94l.pdfIn PDF document text
    • http://the-english-temple.com/tesapebefujaxitudhr0u.pdfIn PDF document text
    • https://sanepawoja.weebly.com/uploads/1/3/4/5/134579143/2a8854810c1bc.pdfIn PDF document text
    • http://scrlt.xyz/71842280611p3zbw.pdfIn PDF document text
    • http://mebel-albero.ru/15622425113ep3u0.pdfIn PDF document text
    • http://noxavikadovul.mypressonline.com/78908791893.pdfIn PDF document text
    • http://paksorond.xyz/89848480893ubala.pdfIn PDF document text
    • http://zudepogumo.medianewsonline.com/nufuxuladekenevifaxofonu.pdfIn PDF document text
    • https://vuvajufuzuno.weebly.com/uploads/1/3/4/4/134480129/2676580.pdfIn PDF document text
    • http://rm-swis-mine.com/keurig_mini_k15_instructions0r3ik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5d8ce70-ab1b-4aff-a93a-adc12ed428c2/wujipezalaramezowoki.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/imagine_dragons_bad_liar_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/sotenazusoxudavujuxiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a151c14-9905-4a3f-b4c9-fb9e8686813c/8434327062.pdfIn PDF document text
    • http://medazupu.onlinewebshop.net/50805798551.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_off0000ff04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF04 5124 bytes
SHA-256: fabc062def964e81591e094949d0787fcdecf2fb5207b531fa86a7fd8fa1b08e
font_01_sfnt_off00011079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11079 11256 bytes
SHA-256: 166a21c1e01f671a892f8af7fb8430bcba941a4b099ad91c9ed59c3a2a3846f8

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