Malicious PDF — malware analysis report

Static analysis result for SHA-256 60337d56730f5df6…

MALICIOUS

PDF

81.9 KB Created: 2021-09-14 05:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 16467e51c3b7cab450c035792bd6617d SHA-1: 908173a543a2a963930bbff021b79d83eb48d007 SHA-256: 60337d56730f5df6f59f5194b70c207d6bdce3a753b6f7135aa756edae4e4521
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users to malicious sites. The presence of external URIs and the ML classification strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pistant.ru/uplcv?utm_term=american+valid+cc+generator PDF link annotation
    • https://mingyi-lock.com/data/file/userfiles/files/lukeketugoxur.pdfIn PDF document text
    • http://newshop.jp/archive/file/55277957532.pdfIn PDF document text
    • http://builderall.info/userfiles/file/85139173597.pdfIn PDF document text
    • http://clinicaveterinariagoitese.it/userfiles/files/xijiki.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1f2a5155b---borebeja.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/sovunorabasiregubor.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/57136085452.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/97368213001.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/43036169767.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/fvhqshd8l54ggkj787j3hhmsli/4146969529.pdfIn PDF document text
    • https://gitteszoneklinik.dk/ckfinder/userfiles/files/navenusetid.pdfIn PDF document text
    • https://www.temtechnologies.fr/ckfinder/userfiles/files/75399328190.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/42677259925.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/43386094001.pdfPDF link annotation
    • http://gamjagolla.com/uploads/files/45998053174.pdfIn PDF document text
    • http://hoachathoanggia.com/userfiles/file/lezopud.pdfIn PDF document text
    • https://robustbrakes.com/administrator/imagetemp/file/mozulef.pdfIn PDF document text
    • http://boek.se/bilder_umeny/File/97747843192.pdfIn PDF document text
    • http://jonme.net/ckupload/files/74350365082.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/20219102357117549.pdfIn PDF document text
    • https://brawlcall.jordanadams.com/ckfinder/userfiles/files/lizomekor.pdfIn PDF document text
    • https://zaindu.drogomedia.com/files/galeria/files/zefedubabafoteguso.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/61116629824.pdfIn PDF document text
    • http://biogenetec.tw/image/files/20210906_002548.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_off0000dc9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B2 10592 bytes
SHA-256: 8f68e7c56a26f8a6efd60b6d395ab78d621f6c5e5aa721ca86cdeaa57c84c5ed
font_02_sfnt_off00010ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA5 17296 bytes
SHA-256: 390f5ee0da9840444575adcab33437f174a2f07c4eb3b7a22086c1389ddead07