Malicious PDF — malware analysis report

Static analysis result for SHA-256 7abe05bb3d4d79df…

MALICIOUS

PDF

90.9 KB Created: 2021-03-29 21:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b12087574fc3fabd355f8928152af22 SHA-1: c3c351bfe4bcebaa433f7ad082b104a942cb62dd SHA-256: 7abe05bb3d4d79df33d66943ba0030ddb29d73aaec5162aa4acc6f7389cbc942
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm or phishing campaign. The embedded content, though heavily obfuscated, likely serves to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://vilenefex.ru/aws?utm_term=singer+sewing+machine+toll+free+number
    • https://cdn.sqhk.co/nanijamu/xjt4jdA/denalun.pdf
    • https://zerebutaravuna.weebly.com/uploads/1/3/5/9/135965874/dbc5944d77b2.pdf
    • https://tupunatuluzike.weebly.com/uploads/1/3/1/3/131383671/765f614ef4e0.pdf
    • https://mejexufuwo.weebly.com/uploads/1/3/4/5/134529557/bowome-doliguwe-padofebifop-koxabajog.pdf
    • https://cdn.sqhk.co/devepogisog/hgAhcky/37139306630.pdf
    • https://cdn.sqhk.co/xamitarerivu/xhi4QFp/draw._io_desktop_mac.pdf
    • https://vilamewu.weebly.com/uploads/1/3/0/7/130775649/juwifijimusomi.pdf
    • https://rurevudo.weebly.com/uploads/1/3/4/2/134265418/37688924a2a.pdf
    • https://tinuwese.weebly.com/uploads/1/3/5/3/135300683/bexor.pdf
    • https://cdn.sqhk.co/zepipawetopi/f3jjZjd/deeeep._io_beta_version.pdf
    • https://fuxilidunud.weebly.com/uploads/1/3/5/3/135314653/rebexiredetuzosedep.pdf
    • https://riveveketudoj.weebly.com/uploads/1/3/4/7/134706505/wijetutot_kogexopoduwu.pdf
    • https://revasarubon.weebly.com/uploads/1/3/5/2/135295272/8127454.pdf
    • https://kedumapeba.weebly.com/uploads/1/3/4/5/134593926/renaz-lefejodadogepab-rovazen-pejidumitog.pdf
    • https://pugoxadegile.weebly.com/uploads/1/3/1/3/131379866/6684195.pdf
    • https://maradezeg.weebly.com/uploads/1/3/5/9/135974492/kuluxuzaxajuba.pdf
    • https://sodumixiseto.weebly.com/uploads/1/3/4/3/134311801/46402.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1f2c1159-37f2-4e61-9cb9-9c9b6043e00f/14191861999.pdf
    • https://uploads.strikinglycdn.com/files/1d6912b7-f539-4a8e-8d88-d25eaa2fe6af/horus_heresy_game_review.pdf
    • https://uploads.strikinglycdn.com/files/25e0599b-8656-408f-a420-9180e4df4396/macbeth_act_2_scene_3_modern_english.pdf
    • https://uploads.strikinglycdn.com/files/c4c6f569-dd17-4687-a79a-a00726326abd/52245278828.pdf
    • https://uploads.strikinglycdn.com/files/7623da5f-4efd-4c9b-98a1-682a3be727b3/rock_band_4_drums_ps4_walmart.pdf
    • https://uploads.strikinglycdn.com/files/bde8f6b5-c25e-41de-b135-6433ea394bb2/51602430749.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_off00012535.bin
44a548cca61e3775558c5e4f8f8d006a4ce9938a5ab4e01cd2fc68ae0a0c8274		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12535 5628 bytes
font_01_sfnt_off00013844.bin
0f115171d8d3643be2039ac845026f6a2c659d14c09da5b5096cdeb6b5b64175		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13844 11132 bytes

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