Malicious PDF — malware analysis report

Static analysis result for SHA-256 6abd9a1af34d89a6…

MALICIOUS

PDF

87.1 KB Created: 2020-12-18 05:02:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b593bdd73added37a8c1a8944bbb13dd SHA-1: bb6766d9c5ef9611bad9f27397ef34f04ceccd2c SHA-256: 6abd9a1af34d89a61e7fb23b03a6896b132465c91aa2210bc76160285bd15e3a
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. It contains numerous external links, including one that acts as an SEO redirector to 'https://trafffi.ru/strik?utm_term=goldman+sachs+background+check+preliminary+approval', suggesting a phishing or credential harvesting attempt. The document body, though heavily obfuscated, appears to be related to a 'Goldman Sachs background check' lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=goldman+sachs+background+check+preliminary+approval PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366369/normal_5fc5a860d43b3.pdfIn PDF document text
    • https://fuzedefona.weebly.com/uploads/1/3/4/5/134578490/lalapipobekured_vigimakesureku_divazuv_derogiwatenet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387817/normal_5fd2ad086a503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380226/normal_5fbe288725506.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379733/normal_5fa0cd2c6cbf9.pdfIn PDF document text
    • https://zosopomejunij.weebly.com/uploads/1/3/4/0/134040517/5895396.pdfIn PDF document text
    • https://xoselupovogim.weebly.com/uploads/1/3/4/6/134610719/lufalewivim_rubas_sebewe_zawodewalusi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375071/normal_5f9114f9c72c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376606/normal_5f8e6c09aa2f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/79a08914-2e8e-4d3b-8746-65fb765ed7b1/23864665681.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14d850a2757459be59ac6/t/5fcedaba64290b1c3dc72cf6/1607391931684/doduxedarodak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c61f6280-9eab-43b1-8cac-83f8369551ad/dbz_legacy_of_goku_2_cheat_codes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fceaf54f127c57ce1508d98/t/5fd149e4b055e57fc5df1cc3/1607551460885/russian_car_simulator.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_off00011007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11007 5884 bytes
SHA-256: f826aa23489b12cef42d49b6af3959c36e406ae9f4e6ca6736ebf970431bc695
font_01_sfnt_off000123eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123EB 13036 bytes
SHA-256: 35d8fe034bab8b091b662886ea4382727383676085e1fe0b39f4207c3954bfbb

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