Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62a8b4e4e47d5d5…

MALICIOUS

PDF

83.6 KB Created: 2021-03-08 21:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ab16c3423753bb7f682f05b75704c08e SHA-1: dbb5cdddde1dcc10cd6e8f5b43caa85f3c952259 SHA-256: c62a8b4e4e47d5d53d0343b12d0cc1c60f6bbc96db07d2bf036939eec05c2d30
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of external URIs and the 'link farm' heuristic suggest an attempt to redirect users to malicious content.

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://pelibifir.ru/aws?utm_term=whitfield+pellet+stove+parts PDF link annotation
    • http://help-feedback-amzn3.xyz/transformers_prime_airachnid_x_jacklv287.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386361/normal_5fcfe6a5b5051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496360/normal_5fdbf4ed91ce7.pdfIn PDF document text
    • http://complect-tech.ru/kaplan_mcat_prep_books_amazon0fbpa.pdfIn PDF document text
    • http://plusstore.pro/microbiology_an_introduction_13th_edition_citationzsvml.pdfIn PDF document text
    • http://libuwapuvewipev.mywebcommunity.org/16456032859.pdfIn PDF document text
    • http://dayzcommunity.info/90028317179sb17l.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/sefugojevixegazuxofiwexo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408483/normal_603f36e176c2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383334/normal_6018e0451fa4d.pdfIn PDF document text
    • http://ttttrrrr.space/nexewomixutilasoj297hk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_6241dc47d3944e3ea97b08c498f48dee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/braveheart_soundtrack_piano_sheet_music.pdfIn PDF document text
    • https://71f68c9c-1037-483c-a0ca-f268b7ddd3c8.filesusr.com/ugd/87fdc7_138fc40b0a954cd1a790cb40d25e58eb.pdf?index=trueIn PDF document text
    • https://32e47638-7206-44c1-ad53-5c6f9176402e.filesusr.com/ugd/e00742_1bcd1cc38827422294cd7a6ba6086d99.pdf?index=trueIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_22eea0a516254598b85fcf49615a4e58.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rimepusox/free_living_will_template_georgia.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/circle_of_5ths_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/oxford_word_skills_intermediate_free.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/vekudowobulixu.pdfIn PDF document text
    • https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_f087919f39634ef68ab3d45dd13b2dbc.pdf?index=trueIn 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_off00010a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A87 5200 bytes
SHA-256: ab0bc2f5c3cfd390c490345091adc10140447e76d7480d1e5b02e43d25ebf1da
font_01_sfnt_off00011c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C45 11100 bytes
SHA-256: 916077e08cc89b1cdac997d55d16e52415624eb36691658ebb186999acf882b9

Open this report in the interactive analyzer, or submit your own file for analysis.