Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb45eb39ee4b31d…

MALICIOUS

PDF

78.0 KB Created: 2021-05-10 08:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 81def5974f7351531306e752385a489c SHA-1: 1041f79b36a50ecc8f38757450fbbbd032f6a270 SHA-256: 0eb45eb39ee4b31df920d024cf6dacbc299f9aae1648f2c9ee66e4b8633758ba
234 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous external links, suggesting it's part of a link farm designed to redirect users. The presence of a 'clipboard command lure' heuristic indicates the document likely instructs the user to execute commands, potentially to download and run a second-stage payload. The document body, though heavily garbled, contains a URL related to 'ms project 2019 standalone download', which is a common lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • 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://druttle.ru/strik?utm_term=ms+project+2019+standalone+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374851/normal_60644d6f4d2a8.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/jQG6mhj/5695163452.pdfIn PDF document text
    • https://nitikado.weebly.com/uploads/1/3/4/6/134660078/5eb36f9.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/nmjfhhk/hatchimals_colleggtibles_season_4_waterfall.pdfIn PDF document text
    • http://kebilosudo.22web.org/weight_watcher_scales_keep_saying_err.pdfIn PDF document text
    • https://cdn.sqhk.co/jonuwezipagi/ifgh7ny/cross_stitch_patterns_star_wars.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387813/normal_5fdfd350ddda7.pdfIn PDF document text
    • https://cdn.sqhk.co/nexoratuxi/ieie2Qu/messages_app_icon_red.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402717/normal_5fee99c9135d3.pdfIn PDF document text
    • https://cdn.sqhk.co/xidafigutoxa/whejb1t/80334476904.pdfIn PDF document text
    • https://kuzuvofaneze.weebly.com/uploads/1/3/5/3/135394893/dedelateje-bagibogativoju.pdfIn PDF document text
    • https://pepadamive.weebly.com/uploads/1/3/4/4/134468065/palasoxo-wijeti.pdfIn PDF document text
    • https://tamilazubi.weebly.com/uploads/1/3/4/6/134604156/9a7f6651994a3.pdfIn PDF document text
    • https://sizeduxaginota.weebly.com/uploads/1/3/2/7/132712537/bozajabipixu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_a235c5ca67c04193aa0aecfddbe94571.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/sevujutevamananitaseguxa.pdfIn PDF document text
    • https://a3e8d6b6-68ee-4625-a313-a25a09dbd39d.filesusr.com/ugd/312e12_872e0b3f739b4205b04fb23b53929498.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/rasomowe.pdfIn PDF document text
    • http://solodiwamu.rf.gd/french_for_beginners_free_download.pdfIn PDF document text
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_9df58e03cf1945f2ba3990f6f027aae1.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C6 5720 bytes
SHA-256: 6525614e13aaacc83828cb3427e67cf5d8cd9edf8f6ec2fb582f8c1e653cfe3f
font_01_sfnt_off0001056f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056F 10932 bytes
SHA-256: 8dfd0638dceaf63d21562beae266d9e3d142408b3f75b9e89ac0d62ff881e23d

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