Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da3885058b076b3…

MALICIOUS

PDF

79.4 KB Created: 2021-03-17 14:26:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b6a7678e737fd856af0cd6a0e10ba4c0 SHA-1: 15aa78375618ddd6825728dae2558725b76ff627 SHA-256: 8da3885058b076b3a11004ff43d82d7a52c913fa39ec740f05f6c7996fd4ffce
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 0.9993

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://jottigo.ru/wix?keyword=smudge+the+cat+meme+generator PDF link annotation
    • https://cdn.sqhk.co/jewezaledev/jeYP3gc/honeypopcorn_skyrim_overhaul.pdfIn PDF document text
    • https://cdn.sqhk.co/rowalulo/Lijghjc/bible_quiz_app.pdfIn PDF document text
    • https://cdn.sqhk.co/fivodewile/jhxCWhh/bingo_vegas_world.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/zhcdthc/63786221657.pdfIn PDF document text
    • http://xazezojalaz.22web.org/72524850941.pdfIn PDF document text
    • https://cdn.sqhk.co/koditisalupe/ieLhhXI/kezufunenabugaxizibo.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/1578697a-f895-46f1-819e-488978b1b1da/sunbeam_bread_machine_5891_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/mehandi_circus_movie_tamil_hd.pdfIn PDF document text
    • https://8b2103c5-345b-48fd-98e3-f19c90c4efd0.filesusr.com/ugd/0e2875_259035f23ec7489cb1714e3ecc917cc4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/marvel_avengers_alliance_2_obb.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/ncert_help_book_app_for_android.pdfIn PDF document text
    • https://00e6f838-d17c-4130-b616-1adf5f4d9bb3.filesusr.com/ugd/714321_d59f8df12e614c338c96b9a48457c253.pdf?index=trueIn PDF document text
    • http://tebimanapedupun.epizy.com/algebraic_geometry_and_statistical_learning_theory.pdfIn PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_a99761f767aa4bf0a417e61d2ff7b4c6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/benuka/roviwegibakoposojemed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69513e9f-49ec-4752-be02-42188e448161/justin_guitar_for_what_its_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6a8a21c-2651-41b0-a793-43d513bad1bb/drifters_season_2_episode_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41514a1e-3bc5-4e0e-97e1-90dc11557c23/made_to_stick_review.pdfIn PDF document text
    • https://0879403c-3be5-48e4-925f-21334a7d5cfe.filesusr.com/ugd/407fcc_6c5845b57d18402395ec6035a1e4e219.pdf?index=trueIn PDF document text
    • https://2e03c77f-99cc-4591-9807-54d8d49c9ce6.filesusr.com/ugd/759733_7fcc006d71424f2bb94ee5f3f9022db4.pdf?index=trueIn PDF document text
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_5b9cb7f8abf44f8ca5ead84818c82477.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/descent_into_avernus_vk.pdfIn PDF document text
    • http://tujetonub.epizy.com/dujagokuketidagefebepi.pdfIn PDF document text
    • http://savemujasowapu.epizy.com/buried_child_script.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_off0000f960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF960 5244 bytes
SHA-256: 0ae96aabcc54e8cd54cd8173a6627dc5be2294091e55db128436a91ef95f4769
font_01_sfnt_off00010b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0D 10952 bytes
SHA-256: a1af9f99b32d5c6963e06d1d9f1ba3d31d4e3bf68a03daa4e9d998e08f153f11