Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d1490981f0f4363…

MALICIOUS

PDF

82.0 KB Created: 2021-05-19 09:35:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77c2211a173687da209ec6a23eca7f60 SHA-1: ae5994879b3c4de1b4854992f60b3c0fce844644 SHA-256: 0d1490981f0f4363c117ad575e7b625f85e799f6453f1ccd632351bef2231f3a
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm, suggesting an SEO spam or phishing campaign. The presence of a 'download button' heuristic and a high ML classifier score further indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and external links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/strik?utm_term=gta+5+apk+skip+verification+file+download
    • https://sokirokesavosa.weebly.com/uploads/1/3/4/9/134901907/6ae0d7.pdf
    • https://vaseviga.weebly.com/uploads/1/3/3/9/133986607/bukuxofarowal.pdf
    • https://static.s123-cdn-static.com/uploads/4388613/normal_5fcc71ffb6bb3.pdf
    • https://lewagezu.weebly.com/uploads/1/3/4/3/134369469/famimataw.pdf
    • https://cdn-cms.f-static.net/uploads/4458389/normal_5feaf035d40de.pdf
    • https://xoverepidagagit.weebly.com/uploads/1/3/4/4/134469055/22ca6f.pdf
    • https://cdn-cms.f-static.net/uploads/4449009/normal_6042e18684893.pdf
    • https://cdn-cms.f-static.net/uploads/4446382/normal_60134d7026d6a.pdf
    • https://cdn-cms.f-static.net/uploads/4456399/normal_604cec0ca6c39.pdf
    • https://jonolepazom.weebly.com/uploads/1/3/4/5/134520471/ba5fe6c9b0a.pdf
    • http://manoligixave.66ghz.com/wixedowajesosevuxuwud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://filivuso.rf.gd/roland_d50_synthesizer_kopen.pdf
    • http://weverikovufom.rf.gd/free_book_folding_letter_patterns.pdf
    • http://dodupubi.epizy.com/how_to_change_unit_on_luggage_scale.pdf
    • http://renirujetumofid.epizy.com/risanam.pdf
    • http://zilaxeputeso.epizy.com/third_price_sealed-bid_auction_optimal_strategy.pdf
    • http://xuboxigaxa.rf.gd/brightburn_2019_full_movie_480p.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000feb2.bin
33ad000f4b22166a3403dd9592304efbadc0ea8ac349ab5649d9c77704c94f12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB2 5520 bytes
font_01_sfnt_off000111a9.bin
cb6be424e6ce831248598bb2219d7e811f086a70515ad514257c2e7c1c0526dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111A9 11552 bytes

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