Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f5da80ae9106ba2…

MALICIOUS

PDF

79.1 KB Created: 2021-03-07 09:17:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 93df5a49c1adbbf18907e19191684a0f SHA-1: 200c7b6781c5f573aa95260c08f742748804518c SHA-256: 8f5da80ae9106ba2c2d78f41a43db8e5df5d31cfa200c5238bced9fee8aeddcd
146 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing lure. The document contains numerous embedded links, with one prominent URL pointing to a suspicious domain likely used for distributing further malicious content or conducting phishing. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links on disposable hosting, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://maypoin.ru/strik?utm_term=how+do+i+log+into+my+arris+modem PDF link annotation
    • https://cdn.sqhk.co/vufisolepu/dBQgg8n/92205585538.pdfIn PDF document text
    • http://a-trvl.ru/software_folder_colorizerv5a6s.pdfIn PDF document text
    • http://milanomoda-italy.site/rirowuwuvupilekasajumizik9400.pdfIn PDF document text
    • https://cdn.sqhk.co/pijujuweg/hiNdji9/macross_factory_satellite.pdfIn PDF document text
    • https://cdn.sqhk.co/tirabipati/S3KOhda/botim_video_call_app_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/metevetufi/g5Djejd/laxemeragadiwanugeroruti.pdfIn PDF document text
    • http://gta-msk.ru/leadership_competency_assessment_answers2ms5k.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6908545e-62f8-40d0-93ca-37eda839d311/get_the_guy_kindle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9531a962-c3bd-473b-886e-0d4bfb971299/where_is_the_water_filter_on_a_whirlpool_side-by-side_refrigerator.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/dotusavosofebuvojewamubi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62ce5013-c9ee-431c-af0f-05453de763b9/rumuvixiduwub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd01e9a4-81aa-4561-8c2e-8e7a7aa04858/32370625575.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae8c3412-8994-49b4-8461-f4b97c8e3fdd/kakafalikiniked.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/chefs_choice_manual_knife_sharpener_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/black_horse_and_cherry_tree_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e840f57e-ee0a-40bb-a178-1f1f166f5468/33479717560.pdfIn PDF document text
    • http://rexefobixavater.myartsonline.com/52986250551.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/the_signal_man_story_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c13b875-023b-456f-a480-3689b49da037/hnsel_und_gretel_film_netflix.pdfIn PDF document text
    • http://petojijoxura.onlinewebshop.net/xuwolelukikale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d08e0b7-683c-4250-a31a-69bd8d10727b/15774895417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04e02969-f23c-41de-85a3-984fd9144907/nutatevopij.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_off0000f8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CC 5300 bytes
SHA-256: 6d8fef0e1ac518e93d348704a2e455c812f9555b1f2699f1e6133be4ddfd2bd6
font_01_sfnt_off00010acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACD 10840 bytes
SHA-256: 041621e32c07467e1f64df543f4f2d5184aaa335d8e885eb9ca94edd7521b1d8