Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3a993f3e0e8eb9…

MALICIOUS

PDF

81.3 KB Created: 2021-05-03 04:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 03f349e1e34714c65d1b5e97f0972f99 SHA-1: 106050ba764f20620b1e45a83721efd4d128d923 SHA-256: ce3a993f3e0e8eb9b5a552454ad7b479a5e8363be5f4c9874289817cbc0fc9c9
146 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. 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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jacksth.ru/strik?utm_term=bose+qc15+right+ear+not+working PDF link annotation
    • https://cdn.sqhk.co/rutisifelom/vohjhej/old_man_s_journey_switch_test.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/MidirH8/33786733954.pdfIn PDF document text
    • https://xuxurebero.weebly.com/uploads/1/3/4/6/134673100/retip.pdfIn PDF document text
    • https://pusiruse.weebly.com/uploads/1/3/4/7/134717846/9e672a0a234d61.pdfIn PDF document text
    • http://mrt-64.ru/22008122355fze3d.pdfIn PDF document text
    • https://suruvimaweluza.weebly.com/uploads/1/3/4/1/134131456/2c193fa8be7ee.pdfIn PDF document text
    • https://kogewovedof.weebly.com/uploads/1/3/4/3/134339257/nibiwofusiv.pdfIn PDF document text
    • https://gapidekejoz.weebly.com/uploads/1/3/4/8/134876705/6636648.pdfIn PDF document text
    • http://tronreserve.online/what_problems_can_a_bad_throttle_position_sensor_causedpcjr.pdfIn PDF document text
    • http://nnorm-id.com/camscanner_pro_android_apkpwefn.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/86069844-4686-4c0c-afa5-c10688d49689/topenimakifipopufunuj.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/what_are_the_best_car_alarms.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/lg_g2_mini_d618_hard_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24e53c54-cfa5-49fa-9608-a1acf68e4c74/13654666191.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/27431343720.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/dagig.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/13210510076.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/wotaparojivukewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef0bd49-9013-4b61-b8a6-422aae9149d0/8043329168.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9F 5536 bytes
SHA-256: 09b3e55602859958727d3ea4ab2a64f5599f8cb13853c5e6c7e08363b6cb80ba
font_01_sfnt_off00011190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11190 11388 bytes
SHA-256: 78fab914dc3a6f5547daad50f0028650ea1bed7694cce7f61d80e84f5464d787

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