Malicious PDF — malware analysis report

Static analysis result for SHA-256 19addd4421a42082…

MALICIOUS

PDF

79.6 KB Created: 2021-03-17 13:44:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 13352eac5e5f436887ed962fb5262154 SHA-1: 1f7c446c574cb16d6aec103fce11a331c22223bd SHA-256: 19addd4421a42082e6ca15a78312a455acd03420d4a4ad3c8ba2df7b44e71596
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to disposable domains, indicating a link farm designed to drive traffic to potentially malicious sites. The document's content, though heavily obfuscated, appears to be a lure related to video game cheat codes. The presence of ML and ClamAV detections further supports its malicious nature, likely as a phishing or redirection tool.

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://botokaw.ru/award?keyword=gta+vice+city+all+cheat+codes+pdf PDF link annotation
    • http://salearea.pro/72949053956wu09r.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/A6qsgih/lezum.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/vV9bheZ/4965056798.pdfIn PDF document text
    • http://triple-doska3.club/37711437421pz2h4.pdfIn PDF document text
    • https://cdn.sqhk.co/tepobugu/OgdDghn/games_like_run_an_empire.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413696/normal_60438acd4a547.pdfIn PDF document text
    • https://cdn.sqhk.co/muzipajat/3gejbf8/tanivapexotizes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385214/normal_5fe86d17adebd.pdfIn PDF document text
    • https://cdn.sqhk.co/jipogidara/BNQqgev/61000887911.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404113/normal_6007334b0d618.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/hieih44/color_blue_worksheets_preschool.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuwutitaw/hgFarwj/assistant_professor_abbreviation.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387929/normal_5fcbcc3a423a2.pdfIn PDF document text
    • http://reduslimitalia-ufficiale.site/dekurotituflbfv.pdfIn PDF document text
    • https://cdn.sqhk.co/zudoputasafe/jYjccgd/mini_basketball_shooting_machine.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuwanuvadi/icEjfhf/carrying_boxes_on_back_of_car.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_6f5d776230694de88c780b924c92550b.pdf?index=trueIn PDF document text
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_01c10627f4d54d90aeb512e124a3db48.pdf?index=trueIn PDF document text
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_4e96677dde4743b1b4164d0a6266ee29.pdf?index=trueIn PDF document text
    • https://4b4b92a8-4ac5-4030-97d5-af0917f8c077.filesusr.com/ugd/0251f0_75241691ac324e2d8e739e1d6518c343.pdf?index=trueIn 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_off0000eaec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEC 5020 bytes
SHA-256: 61c72b23a35c26748d0407a219d5d4a8d1362eb0e9d4aadb8ce5d05ad88594d6
font_01_sfnt_off0000fc20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC20 11056 bytes
SHA-256: 9f0ffe4e760edf8ee1d7fbf13b6c729a313ca4e5127cd2c5526d516b92cef3c5
font_02_sfnt_off00012177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12177 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378