Malicious PDF — malware analysis report

Static analysis result for SHA-256 879e7eb7ab5914af…

MALICIOUS

PDF

125.9 KB Created: 2021-04-07 16:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0bc395de99fa9c3440fe9664b348a9ad SHA-1: eca6e7a61ad5e526b76e54cdc46816ff677df10d SHA-256: 879e7eb7ab5914af2ee3853d5cd39d4079353a9548e14b679c5466de5955b29a
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File Execution: User Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a ClickFix paste-and-run lure. 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 0.9992

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://ponafet.ru/wix?keyword=need+for+speed+carbon+cheats+ps3+pink+slips PDF link annotation
    • http://kernig.pro/chick_fil_a_superfood_side_nutrition_info6d8l9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480895/normal_5fc7a17ed7e91.pdfIn PDF document text
    • http://koreanluxe.com/dexoxasur7zcm8.pdfIn PDF document text
    • http://jaxifas.getenjoyment.net/how_to_reset_bose_universal_remote.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/the_essential_theatre_chapter_4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413370/normal_5fea3b5ab5152.pdfIn PDF document text
    • http://depupejaxidolip.22web.org/utorrent_free_websites.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366382/normal_5ffc60d6883c4.pdfIn PDF document text
    • http://psylath.com/942188828728a2j3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484363/normal_6005fc25b65b5.pdfIn PDF document text
    • http://usmileofficial.site/lewubatitipibemugutu2rzhw.pdfIn PDF document text
    • http://latitekiwa.scienceontheweb.net/ashrae_hvac_standards.pdfIn PDF document text
    • http://honbiz.pro/effective_communication_skills_powerpoint_presentationm8q8y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392868/normal_60205529be603.pdfIn PDF document text
    • http://jowitut.iblogger.org/africa_a_modern_history.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://visunes.myartsonline.com/57447203315.pdfIn PDF document text
    • http://muvekalufisu.atwebpages.com/rademu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0cf7164-30fa-46df-9c22-7b033fa882f2/maytag_bravos_quiet_series_300_code_ld.pdfIn PDF document text
    • http://woxesizefibugel.atwebpages.com/xogawitoxaxonibegesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25358949-5761-4d18-bd74-26d269727676/toro_s200_snowblower_carburetor_adjustment.pdfIn PDF document text
    • http://kifemulawej.epizy.com/ima_adpcm_codec.pdfIn PDF document text
    • http://tosurok.myartsonline.com/how_do_you_read_a_wrist_blood_pressure_monitor.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/wiramesafukapalotodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aa13365-f13a-4699-84f3-7d9cc33a27d0/56683280054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84d192ee-3f20-4495-b7bc-36b8111f93d1/fonopuxi.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_off0001a0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0BE 5368 bytes
SHA-256: 7134fa5f18670d990ecb57e1cc2cbd02adedcfa3e62411a464fafb31de2e7014
font_01_sfnt_off0001b2e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2E8 11888 bytes
SHA-256: 86f13198cfd83302660ee99b5196785762c66372278b3526ed929ddd84ea35f4
font_02_sfnt_off0001db74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB74 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e