Malicious PDF — malware analysis report

Static analysis result for SHA-256 1022b1ffe7ffe209…

MALICIOUS

PDF

80.3 KB Created: 2021-05-19 00:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 724a381df662882c36c31ecba0fb913f SHA-1: f0a88c0c4c6cb6873fbdb4e9f904adb2565bb471 SHA-256: 1022b1ffe7ffe209a2c057966fcb26ba54a193c9085368d976e410f5ba63fc84
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The primary URL, 'https://nipisod.ru/strik?utm_term=download+gta+5+unity+android+mod+apk+obb', suggests a lure for downloading game-related software. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/strik?utm_term=download+gta+5+unity+android+mod+apk+obb PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414487/normal_60272bf921fb8.pdfIn PDF document text
    • http://vozupuwoxugug.22web.org/advantages_of_learning_english_essay.pdfIn PDF document text
    • https://loneluripovulom.weebly.com/uploads/1/3/4/3/134364014/xakipuvak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474989/normal_6067315f33e33.pdfIn PDF document text
    • https://nelejejo.weebly.com/uploads/1/3/4/8/134883178/4036692.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467577/normal_601d4f259328a.pdfIn PDF document text
    • http://bugepugatoj.22web.org/assimilation_theory.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://uploads.strikinglycdn.com/files/7483b89f-7b32-4333-abcd-3e69878d1f3c/zovokurepuzole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/713ffbbb-96a6-4ce9-8152-e619a761f15c/rinevowabojabalatovusol.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/nidamidaliji.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/51910131889.pdfIn PDF document text
    • http://ketugida.rf.gd/bangla_comedy_pic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96c6183d-60ee-47bd-b1ba-db0d58d79f26/kurimiwinidux.pdfIn PDF document text
    • http://biradenaj.rf.gd/78147062500.pdfIn PDF document text
    • http://bubilegire.epizy.com/40371825046.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/adobe_color_printer_utility.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d7bb3eb-a2d2-43e2-9601-f5c1a596ad79/99768845883.pdfIn PDF document text
    • http://vuginok.epizy.com/vocabolario_ceco_italiano.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_off0000e302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE302 5388 bytes
SHA-256: 877f8c5a4da15a2f9f82551fd6870c872274d1ecf0701333856f2c5e792386d5
font_01_sfnt_off0000f549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF549 21992 bytes
SHA-256: 9d3e7caa28e2c79c2b4b6884cb7dc84d380654061e8d1d36a61cf24409d853ee
font_02_sfnt_off00012569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12569 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.