Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e3f0a6bf97f568…

MALICIOUS

PDF

78.8 KB Created: 2021-04-02 16:45:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 612fdc63deba12bf37560b1f1cb0ad3f SHA-1: ee5af6587d3dd2d765678da2ed951ff12d41db69 SHA-256: d8e3f0a6bf97f568911be414bcb588b6eeb2ae89deb004da1a0a91bbfa195bb4
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO poisoning tactic. The primary URL, 'https://golowaki.ru/award?keyword=czasy+przesz%25C5%2582e+angielski+zadania+pdf', is presented as a search result, likely to trick users into visiting a malicious site. While no scripts were explicitly extracted, the PDF structure and the high number of external links, combined with ClamAV and ML detections, indicate a malicious intent, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/award?keyword=czasy+przesz%25C5%2582e+angielski+zadania+pdf
    • https://zuginapox.weebly.com/uploads/1/3/2/6/132695273/buzopiremutal.pdf
    • http://xorabawik.medianewsonline.com/epson_stylus_nx230_wifi_setup.pdf
    • https://static.s123-cdn-static.com/uploads/4404959/normal_5ffd1fe7e488d.pdf
    • http://pakirekugep.scienceontheweb.net/52472858251.pdf
    • https://rominekajamarol.weebly.com/uploads/1/3/4/0/134040464/24ec13.pdf
    • https://static.s123-cdn-static.com/uploads/4374976/normal_5fe45464766b3.pdf
    • https://voxonevixes.weebly.com/uploads/1/3/4/3/134383310/zepisidavuz.pdf
    • https://sotipazokelaxat.weebly.com/uploads/1/3/2/7/132712266/f8aac8c82.pdf
    • https://rowiteruna.weebly.com/uploads/1/3/4/4/134470704/duximazawejure.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/639c5853-65a3-46c3-93ac-d2d233d6ed38/67289002420.pdf
    • https://uploads.strikinglycdn.com/files/ef383519-c634-42b1-b9aa-dd31abf8cf1f/muval.pdf
    • https://s3.amazonaws.com/nerugiraxura/tinuxunewo.pdf
    • http://kubomefewofumim.atwebpages.com/80411874074.pdf
    • https://s3.amazonaws.com/pozokimepe/35653667143.pdf
    • https://uploads.strikinglycdn.com/files/de3c0f54-8c42-4e53-af5b-7d362d8aabcd/75678915788.pdf
    • https://8dcf3d85-40eb-4350-b789-ae6ac2c46e24.filesusr.com/ugd/21d17a_68923bb7fed64e9991156b23f6226d6b.pdf?index=true
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_765ba3cb93274f4892e7081b9457006f.pdf?index=true
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_c9d8eb6af7494d30882a1930c12721c1.pdf?index=true
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_f65b69740b1040fd9ded8a027aeaafb3.pdf?index=true
    • https://s3.amazonaws.com/desenaz/laviniveg.pdf
    • https://uploads.strikinglycdn.com/files/34ce46e4-887d-4493-bd08-b84a10226371/54976677852.pdf
    • https://711920be-b761-4f0e-a604-762b26663b16.filesusr.com/ugd/ffcbea_f1ca328a1bb943ccbe537c5fc03e7c37.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5b2.bin
a51239706e6bba92a9e4a991dda146df87cd38370705e8f544b457c6129bb11a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B2 5104 bytes
font_01_sfnt_off0000f72c.bin
fd16857f1a22fc9f47c60eb7a188a2399fd7ff596f468b735f7f31539f5204e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF72C 12144 bytes
font_02_sfnt_off00011d44.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D44 4324 bytes

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