Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f3ad787c9e86a0…

MALICIOUS

PDF

88.1 KB Created: 2021-03-04 17:51:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 530e7cf0a9bc4fff2771893159ac22e1 SHA-1: efa553f34b0832f0ff2be7e54bf37caadcc6e9c6 SHA-256: d4f3ad787c9e86a0c99c8786df3e2a7b8c2c2ae747827f55dc19d86e78950e68
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and has been flagged by ML classifiers and ClamAV as malicious. The embedded URL points to a suspicious domain, likely used to host malicious content or phishing pages. Although no scripts were explicitly extracted, the PDF structure and external URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://fokemale.ru/wix?keyword=ffxiv+emanation+ex+guide PDF link annotation
    • http://bafujoresepivi.iblogger.org/vuwumagopuvakigozeti.pdfIn PDF document text
    • http://xelibirujegid.mywebcommunity.org/kung_fury_hackerman_t_shirt.pdfIn PDF document text
    • https://cdn.sqhk.co/wanevakaxuma/0fjgGje/konetajufije.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/ShgZGkx/play_store_app_games.pdfIn PDF document text
    • http://sinozokotuw.iblogger.org/88124215712.pdfIn PDF document text
    • http://kixiwogazu.sportsontheweb.net/rinnai_tankless_water_heaters_cost.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/71507361846.pdfIn PDF document text
    • http://dosubodanes.mypressonline.com/josovukowexozenukus.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/ghHiejh/duweta.pdfIn PDF document text
    • http://zovofuti.mygamesonline.org/78395168807.pdfIn PDF document text
    • http://zinedoxo.22web.org/dyson_ball_toy_vacuum_batteries.pdfIn PDF document text
    • https://cdn.sqhk.co/fifapupifig/gjenXih/83568728696.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
    • https://5634f520-c25d-421d-ab67-3d94505d13cb.filesusr.com/ugd/1b85ab_e10ac4b79d53469ea4101e4ab3191027.pdf?index=trueIn PDF document text
    • http://zarevamemamafo.rf.gd/black_and_decker_7_1_2_inch_power_band_saw.pdfIn PDF document text
    • http://wifofevowogak.onlinewebshop.net/samsung_note_20_plus_price_in_malaysia.pdfIn PDF document text
    • https://8149befc-b43a-4ef1-9cfa-1eba15e53b01.filesusr.com/ugd/455f95_1208d802238c4fabbe071cfef94d038a.pdf?index=trueIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/tokikidin.pdfIn PDF document text
    • http://nelifofufotilep.epizy.com/56288183123.pdfIn PDF document text
    • http://molagegivijoxu.onlinewebshop.net/digital_humanities_techniques.pdfIn PDF document text
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_b714a7bddbef4e94b39785d2730fbea8.pdf?index=trueIn PDF document text
    • http://namavorudil.epizy.com/xagewapojokiriteza.pdfIn PDF document text
    • https://3485775d-af35-4505-8fb4-f6750f575e04.filesusr.com/ugd/42f18e_901f8f95595b432599abee410baf0961.pdf?index=trueIn PDF document text
    • http://goxoloxegaw.epizy.com/39511747719.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_off0000fb91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB91 4888 bytes
SHA-256: cc3e9f8fe7d47280502103c91cf751096ac8c5c0d950bba6e31234ba17c50d48
font_01_sfnt_off00010c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2D 10200 bytes
SHA-256: b29cf09b995f250bbb08527dfbf49435cc3ae959758e956ba49de1773bfc3190
font_02_sfnt_off00012f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F56 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073
font_03_sfnt_off0001441e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1441E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e