Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5be0b195de794db…

MALICIOUS

PDF

75.7 KB Created: 2021-06-01 04:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f775dea3001a47a02f5f9358ab8e1abf SHA-1: ff9149d1e0c603268f3e046bca06dad19c85346c SHA-256: e5be0b195de794db1a3e5390d503593ef1f411bb4d03de1875b80721a833ea8b
74 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious download attempt. The ML classifier strongly flagged this PDF as malicious. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://coretry.ru/pbw?utm_term=briggs+and+stratton+450+series+148cc+owners+manual PDF link annotation
    • https://wulelosen.weebly.com/uploads/1/3/5/9/135992808/wususi_pijaneluf.pdfIn PDF document text
    • https://gawotajar.weebly.com/uploads/1/3/4/5/134525297/6635944.pdfIn PDF document text
    • https://bunogijadijis.weebly.com/uploads/1/3/4/8/134896562/67502.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444098/normal_60032b391ed2f.pdfIn PDF document text
    • https://ziwojezevuvige.weebly.com/uploads/1/3/4/5/134500989/tipevojode.pdfIn PDF document text
    • https://firebawoba.weebly.com/uploads/1/3/4/6/134659507/toledakap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369525/normal_602b0a2fc1bf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449604/normal_6067cced70eb7.pdfIn PDF document text
    • https://mejotumuv.weebly.com/uploads/1/3/4/6/134636951/2bc5d51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389805/normal_6006906176051.pdfIn PDF document text
    • https://lozukiwilef.weebly.com/uploads/1/3/4/6/134644014/fezuwodoj-wofivejasiruwe-xakofunivum-kimera.pdfIn PDF document text
    • https://narimokilef.weebly.com/uploads/1/3/4/6/134603618/ad718.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455883/normal_605f70a242eba.pdfIn PDF document text
    • https://lakukuvirukum.weebly.com/uploads/1/3/0/8/130874631/4203282.pdfIn PDF document text
    • 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://bofamawetodo.pbworks.com/w/file/fetch/144433059/18354650959.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/085dbe1d-a7d8-46e8-b2c4-df8673af4d97/how_to_build_a_tree_blind.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7381bb51-49b0-4063-91f1-5f76c5329418/hp_officejet_pro_8600_toner_price.pdfIn PDF document text
    • http://zajozote.pbworks.com/f/xiduramejisexiba.pdfIn PDF document text
    • http://masawumel.pbworks.com/w/file/fetch/144427362/what_does_inactive_account_mean_on_credit_report.pdfIn PDF document text
    • http://dekokos.pbworks.com/f/13610793161.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/f/daxejibudadiwasuwuvas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/646c76f2-cd2f-45b6-ac9d-c73d1a6d959e/winenazijoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c3b8145-c879-43ec-9ca9-d0d479ff6117/69882682261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/042a185e-602d-4f9f-adff-842f667f39c3/cuisinart_single_cup_coffee_maker_troubleshooting.pdfIn PDF document text
    • http://didaneguk.pbworks.com/w/file/fetch/144429102/jufof.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABA 5880 bytes
SHA-256: 8d69051f9a2c69f38225192867048692e5175b217de21f9ec69eacbec65788c6
font_01_sfnt_off0000eebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBF 10620 bytes
SHA-256: 2fa7f7e0d712eabe53904f9715f6845f93c440eb23505897ac206b78c1f3cb60
font_02_sfnt_off00011326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11326 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3