Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ba1d62b715a50e…

MALICIOUS

PDF

85.8 KB Created: 2021-04-10 13:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: dc683c67268c335db21169aa0a7d1908 SHA-1: 984ee918484893011c70c9871b2ffac21b5895c5 SHA-256: 85ba1d62b715a50e91c3934c18aa4604242e2a735c406d262a0a96b7cc971c81
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 0.9991

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://druttle.ru/strik?utm_term=how+to+make+a+flipbook+easy PDF link annotation
    • http://bestita.space/naselilizakunexanume0zm.pdfIn PDF document text
    • https://cdn.sqhk.co/xolilipedeko/LjjXwC1/pinball_game_apps_for_windows.pdfIn PDF document text
    • https://cdn.sqhk.co/papebikuwi/cFieFjb/warren_buffett_stocks_to_buy.pdfIn PDF document text
    • http://mklhhhh.space/nursing_diagnosis_list_for_pregnancythnpd.pdfIn PDF document text
    • http://mastericy-chistoty.ru/paliwataxaeffyo.pdfIn PDF document text
    • https://cdn.sqhk.co/lizubenesowi/e1vDhbm/99272639681.pdfIn PDF document text
    • https://cdn.sqhk.co/rokogikapo/jhcVEha/donilekewulanadob.pdfIn PDF document text
    • http://hookup154.space/61749940519ji2pr.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/gcid1hj/60691487827.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/pjihdbe/eyelash_glue_business.pdfIn PDF document text
    • http://interbankdigital.com/whirlpool_duet_dryer_manual_reset9l37x.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/ijghjaT/antivirus_definition_computer.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://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_44478b880f2f4ff8a845c823ef88b45c.pdf?index=trueIn PDF document text
    • http://pumonufagatoteb.epizy.com/banner_powerpoint_template_free.pdfIn PDF document text
    • https://9534cc33-30dc-483d-bed2-8d5691710d48.filesusr.com/ugd/3835dd_abb4a479bbfb47e6a28c4dd8e8ef2f96.pdf?index=trueIn PDF document text
    • http://varewokumozikon.rf.gd/negizalewoxo.pdfIn PDF document text
    • http://zonadomafi.rf.gd/donekafisagibubudijemarip.pdfIn PDF document text
    • https://b2f02272-107b-4032-aafc-54cdd6265a16.filesusr.com/ugd/6cf392_3764342ebf404f33ae6682a1575f88b1.pdf?index=trueIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_0ef3025f84e148a9a07cd78f7dae0837.pdf?index=trueIn PDF document text
    • https://976edc35-935c-46de-9e6e-e225dbc25668.filesusr.com/ugd/0829d8_b2f052ec04e042d7a12333191ff4c6cd.pdf?index=trueIn PDF document text
    • https://a513df27-8ea1-49e5-9b48-af726a3c99b5.filesusr.com/ugd/c567c1_a70dade293dc414c8432cd4f25f50808.pdf?index=trueIn PDF document text
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_db9251f5248149ed8a77177c470ac4ba.pdf?index=trueIn PDF document text
    • http://ginodoto.epizy.com/49852218602.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_off000101fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FA 4992 bytes
SHA-256: 1fb72cbcd5de431013fd891f3e53aa75b6f8ed8bd8a38f5721c7d3e5d5c56254
font_01_sfnt_off0001130d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1130D 11344 bytes
SHA-256: ae767ef50ef13851e4678c010adda0047ebb827f74a4a98bff2795c2bfbef89e
font_02_sfnt_off000139a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139A4 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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