Malicious PDF — malware analysis report

Static analysis result for SHA-256 f38f2d9b6f13e09e…

MALICIOUS

PDF

83.7 KB Created: 2021-06-08 07:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 28fe8ffd24feed3b78bb96a705a096e3 SHA-1: 9637d2b2c8a0a2b8881436749376278069f3ab4f SHA-256: f38f2d9b6f13e09e75adc7b52d04ef2ffde8a96605594ccb18d79bf739c5c570
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high-confidence heuristic identifying it as a link farm on disposable hosting. The primary malicious URL points to a domain associated with phishing. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pistant.ru/pbw?utm_term=tepung+untuk+buat+onde+onde PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gibuwodebu.pbworks.com/f/79914149605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c19c1dd6-785d-4856-855c-4a3f9b1593ad/rokebatune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cd2c77e-9c4b-4326-bcba-e42bf5bab220/what_does_it_mean_when_whirlpool_washer_says_loc.pdfIn PDF document text
    • http://sokulus.pbworks.com/f/second_conditional_exercises_upper_intermediate.pdfIn PDF document text
    • http://jivevisubido.pbworks.com/f/97004912934.pdfIn PDF document text
    • http://kalunagepigi.pbworks.com/f/loudspeaker_design_cookbook_download.pdfIn PDF document text
    • http://jujirafamena.pbworks.com/w/file/fetch/144465384/1430880315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbf88325-6220-4dda-b2a7-45fe8e8f9587/what_reading_level_is_captain_underpants_and_the_attack_of_the_talking_toilets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5b71df0-102d-4038-bae8-a91ca55e90f3/zubobowojupezuvevupijobeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d9f1d78-ab49-4556-ac0d-03068a922ee9/98430139129.pdfIn PDF document text
    • http://godekazonigi.pbworks.com/w/file/fetch/144459027/40887504662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be59475d-30bc-4f6f-a195-150b2aa06b0b/9752684904.pdfIn PDF document text
    • http://zapibibilubo.pbworks.com/f/fewidanot.pdfIn PDF document text
    • http://zuwofig.pbworks.com/w/file/fetch/144809307/54379562037.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30571128-7187-4f35-8c0b-5b25a1e62dff/the_expanse_season_5_cast_episode_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a4b7c6b-e74a-49ec-8e5a-81521e5544f4/dalexod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/267655cb-1fca-46d6-999a-58b1f58ab743/john_deere_model_214_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b29232ac-daed-47c2-9526-6e2cf64d264f/jackie_chan_adventures_season_1_ep_2.pdfIn PDF document text
    • http://fotowefufet.pbworks.com/f/how_to_set_a_centurion_gate_motor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28a03fdb-4d0f-40f1-8a82-53a59b66ee98/92834809685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9b801d0-973f-40b0-a97b-a5a063ac84d9/what_temperature_should_a_spiral_ham_be_cooked_at.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a3a3376-3f39-448a-9aee-e7966f1ecc22/atem_1m_e_production_studio_4k_specs.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA38 4808 bytes
SHA-256: dcaf08ecc193f1ff018039888d408454779ce7cd017c9652cbf84eded2a0f35c
font_01_sfnt_off0000fa94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA94 10216 bytes
SHA-256: bbfe7e4f37a296e98805c0f4038de404d89917bdf0b43e579e94076ec6f50894
font_02_sfnt_off00011dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC6 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449
font_03_sfnt_off000132f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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