Malicious PDF — malware analysis report

Static analysis result for SHA-256 1559f893b0bd4cf7…

MALICIOUS

PDF

90.6 KB Created: 2021-02-17 23:59:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 53fa00dd68bbecec101994aefff485cb SHA-1: e6349c47240d64cac65c4d9e5b143fb578e4a7d8 SHA-256: 1559f893b0bd4cf71cd57b069a9657ffb41e4f1a9845be136e15cadb1cc7bce3
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, appears to reference a printer manual, a common lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://maypoin.ru/strik?utm_term=imprimanta+canon+mp160+manual+utilizare PDF link annotation
    • https://jovinafunen.weebly.com/uploads/1/3/2/6/132695325/8597632.pdfIn PDF document text
    • https://fedonofawok.weebly.com/uploads/1/3/4/8/134881994/maxagi_zutagim_vifanudizebu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446915/normal_60076887adfc5.pdfIn PDF document text
    • https://sujepofuk.weebly.com/uploads/1/3/0/7/130775011/kejuvibolupiraf.pdfIn PDF document text
    • https://xokebewogaxuwu.weebly.com/uploads/1/3/4/5/134588239/5653c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416935/normal_60121ae5a4f4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365653/normal_5fce14dc72400.pdfIn PDF document text
    • https://pasikozadiru.weebly.com/uploads/1/3/1/3/131384374/sozubezigoxuletuwo.pdfIn PDF document text
    • https://fotelosalif.weebly.com/uploads/1/3/4/4/134463398/1e11d208f291d83.pdfIn PDF document text
    • https://ribavazo.weebly.com/uploads/1/3/5/3/135322422/5e6aaf622f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421215/normal_5ff5f1e62982b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bezepegu.epizy.com/72718313105.pdfIn PDF document text
    • http://feputuwi.epizy.com/covid_rules_for_flying.pdfIn PDF document text
    • http://pakoxerevigere.epizy.com/tevaxibofeniv.pdfIn PDF document text
    • http://kagapari.rf.gd/malaguena_piano_sheet_music_ernesto_lecuona.pdfIn PDF document text
    • http://bibalaluroxute.epizy.com/76044906381.pdfIn PDF document text
    • http://rubuvajaroxe.epizy.com/nafaxibowigenuxasarexuvi.pdfIn PDF document text
    • http://tidefos.epizy.com/23288738899.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_off00012492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12492 5236 bytes
SHA-256: 5a225459edcfe1f29fe602afeb94b5cc6c929300e3456c4345edff2b0ec17ff8
font_01_sfnt_off0001364f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1364F 11364 bytes
SHA-256: e48de68de23f7bdac57ccbec4d2464bad1ddc0ae0f02d8d7c0242fb767e5d4ea

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