Malicious PDF — malware analysis report

Static analysis result for SHA-256 d118740d332dcc9d…

MALICIOUS

PDF

72.0 KB Created: 2021-01-10 17:45:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 11789b48eed492a75fd12c8fa519ebd3 SHA-1: 007a486fe9e8c8ef37bde2b815ae56941df86f3a SHA-256: d118740d332dcc9df0c8611e6458e60fa1635e1e895b479d59147e23b03ca4fa
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable hosting services, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to contain metadata related to a market report, which is likely a pretext to disguise the malicious nature of the links. No scripts were extracted, but the presence of multiple external URIs suggests the document is designed to redirect users to potentially harmful websites.

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://traffking.ru/aws?utm_term=india+tyre+market+report PDF link annotation
    • https://jazazigiw.weebly.com/uploads/1/3/1/3/131398077/282ef1a13.pdfIn PDF document text
    • https://site-1195484.mozfiles.com/files/1195484/flying_birds_silhouette_tattoo_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/fepogosu/ibjdSvl/mycricket_app_payment.pdfIn PDF document text
    • https://limisakaxenit.weebly.com/uploads/1/3/4/3/134371081/63cf44fd.pdfIn PDF document text
    • https://cdn.sqhk.co/lizuxutagisu/awjahen/tawumusivesewaku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502567/normal_5fe15398f3e38.pdfIn PDF document text
    • https://site-1176998.mozfiles.com/files/1176998/80_s_soul_music_love_songs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375716/normal_5f9900e8d1a52.pdfIn PDF document text
    • https://site-1176154.mozfiles.com/files/1176154/753500487.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477910/normal_5fcb7b48a07c0.pdfIn PDF document text
    • https://site-1177153.mozfiles.com/files/1177153/mobile_app_manager_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/TvjgTqB/tujenudax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dc96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC96 4996 bytes
SHA-256: de262f2248b3fbe1676ab1895e8a0b7e010043c050dc1ec28bd7fc665745dd23
font_01_sfnt_off0000ed8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8B 11376 bytes
SHA-256: b4fdb7fd7bd8e0b5c38de9d0cec1ed4567c89f9a4c2398a0112fe21859fecf9d

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