Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b07eb98bc5faa43…

MALICIOUS

PDF

84.5 KB Created: 2021-06-13 00:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: effc9d105d47e0186e2b0e1429e4a829 SHA-1: 978e50e48135e7f6d6df3ce2306a5d72faf3d48a SHA-256: 1b07eb98bc5faa43ed13ee6a09f8497c1b2b4fc3675f6b965134dddd34a1466e
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and an ML classifier, and is detected by ClamAV as Pdf.Phishing.Trojan. The document contains a large number of external links, many hosted on disposable domains like weebly.com, suggesting a link farm designed to redirect users to malicious content. The embedded URLs and the overall structure indicate a phishing or scam attempt, likely using a lure related to 'Cold war zombies dlc 3'. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.
  • 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://ketchas.ru/pbw?utm_term=cold+war+zombies+dlc+3 PDF link annotation
    • https://zisamezasebav.weebly.com/uploads/1/3/3/9/133997726/5579541.pdfIn PDF document text
    • https://mafukizagodixep.weebly.com/uploads/1/3/4/5/134525221/nekipusof-fevutufibirinop-lixaromijef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419218/normal_5fcbaf1a62fb0.pdfIn PDF document text
    • https://diwopoko.weebly.com/uploads/1/3/4/5/134597367/subogit.pdfIn PDF document text
    • https://fabidarupevonu.weebly.com/uploads/1/3/4/6/134620419/musutojivatek_vedanazuwi.pdfIn PDF document text
    • https://jixepelisu.weebly.com/uploads/1/3/2/6/132695865/4028306.pdfIn PDF document text
    • https://katifakemu.weebly.com/uploads/1/3/1/3/131381151/luxasakozudivezijuba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374540/normal_603d39da57c2c.pdfIn PDF document text
    • https://fubareno.weebly.com/uploads/1/3/1/4/131482864/07f6772fa6.pdfIn PDF document text
    • https://xawimoveparuz.weebly.com/uploads/1/3/4/0/134040397/jivoxot.pdfIn PDF document text
    • https://xijivokabororix.weebly.com/uploads/1/3/4/8/134879859/zasafubafefepulevut.pdfIn PDF document text
    • https://vexakoloninabi.weebly.com/uploads/1/3/4/8/134851928/konazojonuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473375/normal_6065ac788c4d4.pdfIn PDF document text
    • https://baxiboxizalitif.weebly.com/uploads/1/3/3/9/133987723/4428793.pdfIn PDF document text
    • https://rigavimiba.weebly.com/uploads/1/3/0/8/130814992/ralanutunem.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/90833a76-865b-4c0a-8b4d-afadd546c2db/how_to_make_your_name_pretty_in_royale_high.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2351917b-5cf5-46aa-8ec8-baf6d3200d03/revealed_a_house_of_night_novel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/621e419b-e156-4824-b80c-a4584a03901d/euro_truck_simulator_2_product_key_free_download_for_pc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE226 13024 bytes
SHA-256: 41aed4992d96dd37693b98362f6f83616e945dd1f681988cbffee0784e0b1564
font_01_sfnt_off00010cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFE 5436 bytes
SHA-256: 66b3e2d37a7fea6eadfc79fd333ac455a60934a44e29f104e0c42c3b11d8556b
font_02_sfnt_off00011f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F74 11240 bytes
SHA-256: 27336d8fbb517f0646062c7e280f68c2b1f8a1835ac9e8210d2f23dbdce1dc1e