Malicious PDF — malware analysis report

Static analysis result for SHA-256 304f9692902ff0fb…

MALICIOUS

PDF

68.6 KB Created: 2021-03-15 07:16:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1d14f9f66c7928e314cfacd9f011a53b SHA-1: 1b228784bf114ccc484b8ce05638242ba1fd6fa8 SHA-256: 304f9692902ff0fbcaf130fab46c7d15605976957c7911a6dedcd0ea0af963dd
186 Risk Score

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. 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 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/wix?keyword=hadoop+definitive+guide+4th+edition+pdf+download PDF link annotation
    • https://fuduxudeki.weebly.com/uploads/1/3/4/6/134606049/lejenumikuzudor.pdfIn PDF document text
    • https://dawejiji.weebly.com/uploads/1/3/4/5/134505451/7478459.pdfIn PDF document text
    • https://venaresumizom.weebly.com/uploads/1/3/4/4/134468274/1d8d1a34333079.pdfIn PDF document text
    • https://webegerux.weebly.com/uploads/1/3/4/7/134759049/musiranebukexerojule.pdfIn PDF document text
    • https://vifozafep.weebly.com/uploads/1/3/1/4/131407061/4144998.pdfIn PDF document text
    • http://nukowivoxom.iblogger.org/15470304238.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/769f11fb-50d5-4c50-b801-f6fa2c3a3667/hp_officejet_pro_8600_os_x_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/625985b7-8377-46bf-8e63-b70f6f1e98ce/watch_the_count_of_monte_cristo_movie_2002_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/62960967776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c2302a5-5f76-4ca6-b867-951a66188934/9997651568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/516df0c4-9166-41fe-894f-617c42061c1c/why_has_my_samsung_sound_bar_stopped_working.pdfIn PDF document text
    • http://domusas.rf.gd/40151003757.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8beffae-a29c-4972-a7bf-001fbf641fd4/2013_kenworth_t800_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a58e234b-318d-490a-85f3-fe62baf224f4/how_to_tell_if_your_furnace_inducer_motor_is_bad.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/effingham_performance_center_box_office.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/068617b9-4aa8-49a9-a4a6-581b0fe31784/jawbone_big_jambox_wireless_bluetooth_speaker_review.pdfIn PDF document text
    • http://gisipusizen.rf.gd/76099338502.pdfIn PDF document text
    • https://77bc4ea4-de20-41c0-a463-a5315db628d9.filesusr.com/ugd/2c69e3_d788fc17cfd0458eadd7253a83f57008.pdf?index=trueIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_f3dcdfebb49a40c2934e7b8b50dd37a0.pdf?index=trueIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_0c424a37fe8a43fcb09094df1273f650.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bezutu/vububaganer.pdfIn PDF document text
    • https://4694dce0-4d1e-4c77-b4da-d1f025f82355.filesusr.com/ugd/fb332b_53eb86c7f9c64774a7a5b6d746a6a668.pdf?index=trueIn 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_off0000ceb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB2 5232 bytes
SHA-256: 252fd7cdbaf8b65b93e759ecaac2c048d871492c3d3e3071dab780d3f58a4904
font_01_sfnt_off0000e09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09F 10676 bytes
SHA-256: 9b791ded22bc877f836dc0eb864782e253e887753a5a07b1878a433a8e74b84a