Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68d46996548f3c4…

MALICIOUS

PDF

74.2 KB Created: 2021-01-15 07:22:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: dca2a290d3b8255274b5e080c71162e0 SHA-1: d4a5ff97f21f2b43592a80236e14954c594abc7c SHA-256: d68d46996548f3c4160df80588ad839dec19ecb0b5525afe2d7b421d0270b053
196 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 ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, including one to a redirector at 'trafffi.ru', suggesting it's part of a link farm or phishing campaign. The document body, though heavily obfuscated, hints at a lure related to 'Google sheets script remove duplicates', likely to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafffi.ru/aws?utm_term=google+sheets+script+remove+duplicates PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420760/normal_5fca26655708d.pdfIn PDF document text
    • https://wukelefitifaka.weebly.com/uploads/1/3/4/8/134882985/zoguvu-rixofipe-damiwira.pdfIn PDF document text
    • https://kuromazu.weebly.com/uploads/1/3/2/6/132695519/juwedegiduwelo.pdfIn PDF document text
    • https://safipeta.weebly.com/uploads/1/3/1/4/131408280/8981074.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/zidiwupigudodo-nolol-jijulunakuki-xozutukap.pdfIn PDF document text
    • https://tugupititu.weebly.com/uploads/1/3/4/8/134887320/2002915.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412387/normal_5f9d7ac5e3795.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417327/normal_5fc8d398de6f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393486/normal_5fe7807a47a92.pdfIn PDF document text
    • https://degusatujetuz.weebly.com/uploads/1/3/0/8/130813325/2253412.pdfIn PDF document text
    • https://besajovepew.weebly.com/uploads/1/3/4/6/134633036/871032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381095/normal_5f8fd56764331.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458838/normal_5fc98c16bd5fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384029/normal_5fff4921df6f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/47738714982.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE541 5576 bytes
SHA-256: 76867fd896426a73178ce0089173a2ea7fdd942d21059be0191dbdc8412f04a9
font_01_sfnt_off0000f81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81D 10392 bytes
SHA-256: 78da05dad2de7641f9fe17d35b363cf2178ea88c002ffcae578127d4d29c2e8d

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