Malicious PDF — malware analysis report

Static analysis result for SHA-256 373c14fef788a70f…

MALICIOUS

PDF

87.7 KB Created: 2021-03-25 13:07:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89348267641f81a1e66da38cb1d779c2 SHA-1: ea10e22a12928c2d25c1eced607e54404c4adefc SHA-256: 373c14fef788a70fa9c59450da4c1d41cd9a23874ca1f714afb4444992493858
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The document contains a large number of external links, many of which are likely part of a link farm designed to redirect users to malicious sites. The embedded URLs and the PDF's structure suggest an attempt to exploit users through deceptive content, potentially leading to credential theft or further malware infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/123?utm_term=arya+2+malayalam+movie++masswap
    • https://cdn.sqhk.co/keropolor/jjqAjfp/77148484592.pdf
    • https://cdn.sqhk.co/zikegasenar/gejhqJE/xarabilamuvagabejivizafen.pdf
    • http://vertitribe.store/vadorodamomac6bai.pdf
    • https://cdn.sqhk.co/lijipatalenu/ndZifgc/drawing_games_3d_apk.pdf
    • https://cdn.sqhk.co/buzosefif/bFgdut5/ludowici_ga_county.pdf
    • https://cdn.sqhk.co/wuwosexed/Gihhjge/pitol.pdf
    • http://excellent-spb.ru/amiable_analytical_expressive_driverxqdnt.pdf
    • http://geparup.scienceontheweb.net/what_is_latest_pmbok_edition.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_d71893ea8822438fa4798c37a27eb99e.pdf?index=true
    • http://tevefetilojas.atwebpages.com/adobe_reader_download_free_9._1_download.pdf
    • http://fazobelo.onlinewebshop.net/52636687533.pdf
    • https://b147a2f3-58af-4013-9def-597e86e94513.filesusr.com/ugd/47d6bb_567f07ba75064b1a81cabb3fff0f6e99.pdf?index=true
    • https://4bbf79d8-97e4-42de-9a75-948158c354f0.filesusr.com/ugd/52f5d3_ee96a3dfdfb14eb7bf333f02e981ccd0.pdf?index=true
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_42e9759ca6a543e58bb4fa4e20825db3.pdf?index=true
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_5510297ccbe74eb9ae47b9f9e30cd899.pdf?index=true
    • https://77701ba7-c5ad-4750-ab17-5b03548f7fc0.filesusr.com/ugd/9a242c_7727be58f04c426d83723a255c3442eb.pdf?index=true
    • https://dd907c4b-492b-4b4d-bf3c-9f0b7a2bd2c7.filesusr.com/ugd/96a426_4eac124301ca46d69229a77a621583a3.pdf?index=true
    • https://42cc6f6d-9125-48bc-bce4-1bf15f49b1be.filesusr.com/ugd/7c30af_961d376e2167477d9c017df16a111b54.pdf?index=true
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_b66a685924ab4b0b9a46cdfdfe3c7ac8.pdf?index=true
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_ba4ee4bf92714c2c8e51a9f3800e480e.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102e2.bin
567cf9a3dd3ae566706cbec24dddde267d146da63dc49499f76c6f22d30e63a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102E2 5340 bytes
font_01_sfnt_off00011513.bin
e93d6c69b117bb666a0cef4113ee8a0183d4ab975555720a96904d99f048af31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11513 11656 bytes
font_02_sfnt_off00013be4.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BE4 16164 bytes

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