Malicious PDF — malware analysis report

Static analysis result for SHA-256 1531097059c675c7…

MALICIOUS

PDF

95.0 KB Created: 2021-09-16 17:43:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: dd97392410a74ac9493240bb38732ceb SHA-1: a006bb848341de96e55851effafa45b6fee1dc15 SHA-256: 1531097059c675c7f74f149d013a5f2520a13bc0fc7ef07df7ffa7fdfcb46497
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous external URIs, many pointing to disposable hosting, and one specific URL is identified as a link farm. The document body is heavily obfuscated and unreadable, suggesting it's designed to conceal its malicious intent rather than convey information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/uplcv?utm_term=xiaomi+redmi+note+10+pro+pros+and+cons PDF link annotation
    • http://purepassion.pl/userfiles/file/26003888972.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/wagalixawaletaxuwiwage.pdfIn PDF document text
    • https://ka-base.no/images_content/file/75699165873.pdfIn PDF document text
    • http://rqconsultores.com/userfiles/file/35271153323.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/09/11/45029372340.pdfIn PDF document text
    • https://duvanco.be/docs/files/15108730898.pdfIn PDF document text
    • http://www.miyadenthai.com/image/upload/File/vuvuzuwafolidope.pdfIn PDF document text
    • https://profesa.net/userFilesfile/bujiwepufixiguguzir.pdfIn PDF document text
    • https://wct.goldcrownresort.com/magazine_files/files/vagokefumodaxer.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/lb0fmpe8gnrgf6rd5kl7vdnhu4/89043522810.pdfIn PDF document text
    • http://brianhaymore.com/images/e/file/93495808673.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/3a3eadp17n333t6out5dkr20g4/wuxubuxuj.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/navuritaba.pdfIn PDF document text
    • http://lblussana.it/images/file/41206681974.pdfIn PDF document text
    • http://kystar.net/filespath/files/20210902115757.pdfIn PDF document text
    • https://khmernative-rice.com/userfiles/file/28591586674.pdfIn PDF document text
    • http://giasuthienphuc.com/Images_upload/files/6218155792.pdfIn PDF document text
    • https://tch.lu/files/files/72747132265.pdfIn PDF document text
    • http://xutricolor.com/uploadfile/files/81172096972.pdfIn PDF document text
    • https://un7un9b3rl1pa7-99.com/contents/files/vidosiverazube.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/nibafumonukogilarasukazo.pdfIn PDF document text
    • http://prtourusa.com/FileData/ckfinder/files/20210908_6EA1041E13498103.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/75979002644.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/5400686035.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/femararogojalube.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6E 10808 bytes
SHA-256: 16d10bdd86a8a7d7ac4201e5dec1f4cccc14258b0569059d46e02093a4c4ae62
font_01_sfnt_off00012657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12657 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E69 18504 bytes
SHA-256: f57ab42a807a1cab581181019ab433a05a58d2a2d0a9c957c308ec852e4d09fc

Open this report in the interactive analyzer, or submit your own file for analysis.