Malicious PDF — malware analysis report

Static analysis result for SHA-256 34b224facbddbc00…

MALICIOUS

PDF

169.2 KB Created: 2021-06-09 14:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9f76a31b3d1652d01f38df9565beb919 SHA-1: 0081de3f69b3a5131248fb4c0bf2e8d5d14c99b2 SHA-256: 34b224facbddbc006535e58416fe044dd7698f45c7244091b20499533315f56a
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 0.9861

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://ketchas.ru/pbw?utm_term=download+manga+pdf+one+punch+man PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4462696/normal_60b060aac51a8.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4489713/normal_60b0f35ca3216.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374211/normal_601a72f84523a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479678/normal_605d4178a11bf.pdfIn PDF document text
    • https://guduzuzej.weebly.com/uploads/1/3/1/6/131606672/lilopejutumuxav-befobapibekura-vatavo-wamoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444371/normal_60303b692baa0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451542/normal_600f582595091.pdfIn PDF document text
    • https://latavulepa.weebly.com/uploads/1/3/4/4/134461708/jabopofik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472200/normal_600ec108af217.pdfIn PDF document text
    • https://takesefitetipal.weebly.com/uploads/1/3/2/6/132682925/716380.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379618/normal_6038b555baa1f.pdfIn PDF document text
    • https://ranatugirebulox.weebly.com/uploads/1/3/4/0/134017659/8553940.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386335/normal_5fe40957bb531.pdfIn PDF document text
    • https://fajuvupo.weebly.com/uploads/1/3/5/3/135310445/16a58.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/3ca4843e-f0c8-4642-b49b-a680059d3afb/51664700322.pdfIn PDF document text
    • http://jadubunid.pbworks.com/w/file/fetch/144830265/modern_combat_5_hack_pc_cheat_engine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39749386-8be1-4060-91bb-2cb23c16841f/80362864718.pdfIn PDF document text
    • http://saxonax.pbworks.com/f/how_to_hook_up_surround_sound_to_a_hisense_tv.pdfIn PDF document text
    • http://bojirakaj.pbworks.com/w/file/fetch/144796377/what_does_class_rank_reporting_mean.pdfIn PDF document text
    • http://nugewil.pbworks.com/w/file/fetch/144649617/jazz_piano_book_free.pdfIn PDF document text
    • http://bawamotijeku.pbworks.com/w/file/fetch/144784725/chhota_bheem_ka_cartoon_video_mein_dikha_do.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1c8f4ad-54fe-43b6-a6d1-cb76ee3cc735/what_is_the_dirtiest_cards_against_humanity_box.pdfIn PDF document text
    • http://garigor.pbworks.com/f/ramil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5550c2cc-b021-49ea-a0f5-645eb98592ef/photography_a_cultural_history_4th_edition_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/469c2166-a0ee-4d80-963f-7ecbc189a43a/how_do_you_program_a_universal_remote_to_a_wayne_dalton_garage_door_opener.pdfIn PDF document text
    • http://pajajafilexe.pbworks.com/w/file/fetch/144748932/pirates_of_the_caribbean_1_tamil_dubbed_movie_free_download_hd.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
stream_002_off00016e3f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16E3F 70860 bytes
SHA-256: f8a540169be51bb9dd21293411b26e9aa60e7121a53fc808f473685dea107f17
font_01_sfnt_off000244bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x244BF 5388 bytes
SHA-256: 929aaa4ca510bade4bef80a9c399076f8d55d4ab7083f530dc7db5d505b96ab3
font_02_sfnt_off0002570e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2570E 11912 bytes
SHA-256: 4f8f209f4e0f965ae823fc87794aae1c977c13d997e161be575f691ee1bbb65d
font_03_sfnt_off00027f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27F85 16248 bytes
SHA-256: cacce353daa52449aaa2dc03ff14e12d7f37b8e2e541d6bae97b449db5f5a003