Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d62f8744539fd0…

MALICIOUS

PDF

80.7 KB Created: 2021-03-02 23:42:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6047567f925f7c4c087ce27017d6ea4b SHA-1: 11a230fe8fa5fb191c907ed1db63cb070a7d2a7a SHA-256: e9d62f8744539fd0e75c098b82a5927e44e28a9aba96fa7124f8179818cf4e85
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://xezojetit.ru/strik?utm_term=is+free+stock+music+safe PDF link annotation
    • https://cdn.sqhk.co/wuwoxegolewa/fQgYbjj/funny_gifts_for_old_man_birthday.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/chdMjeH/62020086260.pdfIn PDF document text
    • https://baduzizexajozej.weebly.com/uploads/1/3/4/6/134653824/9244166.pdfIn PDF document text
    • http://vuvuga.xyz/european_paediatric_advanced_life_supportwitrt.pdfIn PDF document text
    • https://cdn.sqhk.co/venitalobeni/gHCnDha/amc_studio_30_houston_tx_showtimes.pdfIn PDF document text
    • http://peuly.xyz/pulewewba915.pdfIn PDF document text
    • http://mujabelor.mywebcommunity.org/18820580641.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/mefuf.pdfIn PDF document text
    • http://idealica-columbia.site/cystic_fibrosis_foundation_patient_registry_reportyg8xr.pdfIn PDF document text
    • https://fapuwokezisojo.weebly.com/uploads/1/3/1/4/131453853/2368223.pdfIn PDF document text
    • http://feelslike35.com/zakemivanononexavmhb3.pdfIn PDF document text
    • https://komijeji.weebly.com/uploads/1/3/1/6/131606126/wivagu.pdfIn PDF document text
    • http://bcpreactiva-enlinea.com/tipidivewinemoxoxuwx8aw.pdfIn PDF document text
    • https://farurepakal.weebly.com/uploads/1/3/5/3/135318469/4209946.pdfIn PDF document text
    • https://cdn.sqhk.co/wexunaveb/d4jh5ja/96632295184.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/biriyani_movie_1080p_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/95338055107.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/duvurudedeleluforen.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/used_john_deere_lawn_tractor_attachments_for_sale.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A6 4996 bytes
SHA-256: d88c0cf4cc4d127449f4742ad0a782281f4cc11b0050a41e59621ab704587920
font_01_sfnt_off00011191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11191 10664 bytes
SHA-256: 64f4760eea1ebcbe346d000f1752eec3acb4f2ffcfba22da45b90bd533ec1b86