Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fdb88d5e48c3154…

MALICIOUS

PDF

81.2 KB Created: 2021-03-20 11:06:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5314ee309ca48cc65abf75df92e9c674 SHA-1: 51d743811300256f1f6bef5d7d59de0c2bd6bfe3 SHA-256: 2fdb88d5e48c3154df1c63ffe63d50b8aa656bd31afa1a9c77026db117659464
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 0.9998

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 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://soxebez.ru/wix?keyword=bowflex+heart+rate+watch+manual PDF link annotation
    • http://scrlt.xyz/why_the_rich_are_getting_richer_by_robert_kiyosakioo9ma.pdfIn PDF document text
    • https://vasaradafivoza.weebly.com/uploads/1/3/6/0/136048391/5968d5826.pdfIn PDF document text
    • http://bejavivamiji.22web.org/garmin_gps_12_xl_user_manual.pdfIn PDF document text
    • https://vufumepuzatine.weebly.com/uploads/1/3/5/3/135335191/xerunukolewazot.pdfIn PDF document text
    • http://ses-sanobrabotka.ru/zoomer_dino_directionshmg1c.pdfIn PDF document text
    • http://tomandbxof.site/how_do_you_add_like_terms_with_exponentsvr7lp.pdfIn PDF document text
    • http://uggi-ugg.com/bogurunatogaxovafebuwupuejts0.pdfIn PDF document text
    • https://buseziji.weebly.com/uploads/1/3/1/3/131398529/07ca8e4d4d7a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_e543c3be0d68400e8930620502d6ff01.pdf?index=trueIn PDF document text
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_11ffeabe537b48d0bea027070078c32a.pdf?index=trueIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_79ed76270c964f7ab578a8a7360fcff9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/how_is_bovine_spongiform_encephalopathy_transmitted.pdfIn PDF document text
    • http://jomobagezib.rf.gd/bakajubibakopesus.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/oracle_database_12c_download_for_windows_64_bit_free.pdfIn PDF document text
    • http://rarefovukafulu.rf.gd/xadivinexolipo.pdfIn PDF document text
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_33903ed1dd0a4099ad52044678fb0819.pdf?index=trueIn PDF document text
    • http://bororatofidapuw.epizy.com/sap_supply_chain_management_tutorial.pdfIn PDF document text
    • https://94aa8f26-b07a-4c24-bdb4-4112657565c9.filesusr.com/ugd/37428b_ddfc6cd33bf642ed85d378e1bab78dbf.pdf?index=trueIn PDF document text
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_135354309ba0455ca9298e3b44655d22.pdf?index=trueIn PDF document text
    • http://lagefow.epizy.com/lungi_dance_song_dj_mix.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_off0000fd1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1A 5152 bytes
SHA-256: 3f4ea5bc0aee30a000ede2623fab23d12d78e60ccec98970fb16074acb64a656
font_01_sfnt_off00010e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E90 12028 bytes
SHA-256: 7126a19ec612031c868436bfc031fc6970d92570f7bee150acc26e9208aee0f6