Malicious PDF — malware analysis report

Static analysis result for SHA-256 d446fcbd60e75390…

MALICIOUS

PDF

75.5 KB Created: 2021-03-21 08:47:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62073faef7a14282b648d3fad9a5ad76 SHA-1: 75c55c41bbc8868c94c6993be3b6330d63dbe4a2 SHA-256: d446fcbd60e753909bbe9ff4af7d9026caa6e8986ca27d54fe83f5c2d8524661
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to technical setup instructions, designed to trick users into visiting these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=belkin+n300+wireless+range+extender+model+f9k1015v1+setup
    • http://italia-doc.space/microsoft_visio_org_chart_template941ub.pdf
    • https://ganajefij.weebly.com/uploads/1/3/4/8/134884795/jobotimavog.pdf
    • http://1offpark.xyz/66965185541y2v81.pdf
    • http://ag-management.space/all_recipes_baked_potato_casserolep7toj.pdf
    • http://wildboost.club/wamapepepusizuwudibimavuf5h34y.pdf
    • https://fomemifeju.weebly.com/uploads/1/3/4/7/134769467/917d94.pdf
    • http://dronextactical.xyz/912801585031bbpi.pdf
    • http://axecheat9.xyz/50_shades_darker_full_movie_download_filmywapgn5a2.pdf
    • http://gratoraama.space/gakuwozobibobeboq9ne1.pdf
    • https://cdn-cms.f-static.net/uploads/4384030/normal_5fd828fd3ee82.pdf
    • http://sq11mini.com/98723823168dbafw.pdf
    • https://cdn-cms.f-static.net/uploads/4482617/normal_60281e0f8165c.pdf
    • https://static.s123-cdn-static.com/uploads/4454673/normal_5fe31044e0e63.pdf
    • https://cdn-cms.f-static.net/uploads/4482027/normal_600ae4f1376c7.pdf
    • http://zeropium.com/pittsburgh_5_in_1_stud_finder_reviewsxgsuc.pdf
    • http://goloszauniver.fun/86568500472a8zb7.pdf
    • http://mpvideo.org/82934424914brtb.pdf
    • http://kpupnov.pro/wash_your_face_workr27te.pdf
    • https://cdn-cms.f-static.net/uploads/4381971/normal_602f40d1a2ee8.pdf
    • https://static.s123-cdn-static.com/uploads/4478398/normal_5fcb6f3833e61.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000e678.bin
ae0f99d122a590451c119dd105409ba1a3df75d9b0f8e926a8cf1a78d2b38645		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE678 6332 bytes
font_01_sfnt_off0000fc1b.bin
c50d98654c72dba14dd49e63eda3b182ac59027f3014b730aeb086271c77723a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1B 10672 bytes

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