Malicious PDF — malware analysis report

Static analysis result for SHA-256 d86642b6e0f78af9…

MALICIOUS

PDF

75.5 KB Created: 2021-03-22 06:25:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d17ba48ca7466893dd52221db1347dd7 SHA-1: 71f57def0ac5cde230e0c0c9b42e46364ef93d75 SHA-256: d86642b6e0f78af9d6265bb4657900981941014e376e49538ed28dd927cad011
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://soxebez.ru/123?utm_term=calgary+stampede+map+pdf PDF link annotation
    • https://cdn.sqhk.co/remozemot/Wicjh70/hashtags_for_instagram_artists.pdfIn PDF document text
    • https://cdn.sqhk.co/vemosoveveb/gcjgdrp/jurassic_park_trespasser_full_game.pdfIn PDF document text
    • http://pifemukopisare.sportsontheweb.net/8857822410.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/finders_keepers_movie_jim_carrey.pdfIn PDF document text
    • http://pidagenavuziw.mywebcommunity.org/12975898380.pdfIn PDF document text
    • http://fexevewuli.mypressonline.com/41110065985.pdfIn PDF document text
    • http://faxejurimuzuret.22web.org/78322689741.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/Digiap5/fipokafo.pdfIn PDF document text
    • http://tapidiv.medianewsonline.com/64916483731.pdfIn PDF document text
    • http://lodamokabufena.22web.org/xofowegij.pdfIn PDF document text
    • http://zodelem.mygamesonline.org/behringer_u-phoria_um2_mac_compatible.pdfIn PDF document text
    • https://cdn.sqhk.co/rotonoba/ddgg5Kl/52526582099.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://getetir.epizy.com/espen_guidelines_enteral_nutrition_renal_failure.pdfIn PDF document text
    • http://mewabetowa.myartsonline.com/30143218540.pdfIn PDF document text
    • http://lujolugajejizog.epizy.com/cisco_ccna_1_chapter_2_exam_answers.pdfIn PDF document text
    • http://mopezuvo.epizy.com/fixekarefaroxixobogina.pdfIn PDF document text
    • http://lufevexos.atwebpages.com/bm_sharma_physics_jee_main.pdfIn PDF document text
    • http://lisunamubeso.epizy.com/28324491171.pdfIn PDF document text
    • http://woxesuguve.epizy.com/beats_pill_wont_charge.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_off0000e7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F9 5368 bytes
SHA-256: e20d8d472f7314dc50a1a0486162bf834de8ac2a3d935af30c18decc71e2c8d7
font_01_sfnt_off0000fa2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2F 11720 bytes
SHA-256: 21616621c92400839d63ffb5f01350765465a105ffafb96d3d8c86b374dedac8