Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf03e7970b616d9e…

MALICIOUS

PDF

65.9 KB Created: 2020-11-20 12:16:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 854e6b40b64ea4f31fa51fba239a3706 SHA-1: 5d565d5269eb107ac84e2af14615054503fc9918 SHA-256: bf03e7970b616d9ebce31db13a5baec818ab4c4fd17db1b153394e427c5ee24a
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The presence of a link farm suggests an attempt to obscure the final malicious destination, likely for phishing or malware distribution. ClamAV and ML classifiers also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/123?utm_term=molecules+and+compounds+worksheet+answers
    • https://tototatinup.weebly.com/uploads/1/3/4/3/134332383/bemezugakelune_lekibal_mowox.pdf
    • https://letitunonagafi.weebly.com/uploads/1/3/4/4/134494227/3440429.pdf
    • https://maremuwalivode.weebly.com/uploads/1/3/4/6/134632863/7198097.pdf
    • https://jefogozadiz.weebly.com/uploads/1/3/4/0/134040800/lexesalem.pdf
    • https://lifafogiter.weebly.com/uploads/1/3/4/3/134321186/3956671.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zinudipir/protocol_g_series_helicopter_manual.pdf
    • https://s3.amazonaws.com/muvarelo/urgent_care_wauseon_ohio.pdf
    • https://uploads.strikinglycdn.com/files/c17eae38-ac4c-4d16-b9ff-ee3e4c8f5d00/shatnez_laboratory_brooklyn.pdf
    • https://s3.amazonaws.com/kokesatodixon/5868129820.pdf
    • https://s3.amazonaws.com/lakujusitejojet/pujavajosesulorugoze.pdf
    • https://s3.amazonaws.com/vezumobigodub/michelin_star_guide_2020_uk.pdf
    • https://uploads.strikinglycdn.com/files/ba805ae1-8b82-4f34-a65a-133bfef039c2/lotunofowamumorikeduvudop.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3a1.bin
8ca7b4b62fa0f66cba8ade3b00301e51feaa295d6c98e36f0046b7272acc2a15
pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A1 5472 bytes
font_01_sfnt_off0000d62c.bin
be00cb774f0607343ed8cb6f6331cf24b8bbe166db8f2e666bcf732ccaf85139
pdf-font-stream PDF embedded font (sfnt) at offset 0xD62C 10972 bytes