Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe5981e1a7126f0…

MALICIOUS

PDF

117.6 KB Created: 2021-03-15 21:53:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ada78ed464b2940113fab1e18bd10635 SHA-1: 98f510003c097dc8fd374e5c5fb170f8f031f3a5 SHA-256: 0fe5981e1a7126f03f5ac0de204becae3730d3719f64c9d920a8badc5a2ba8d7
146 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. It uses a callback-phone (TOAD) 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 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://midufefew.ru/wix?keyword=milwaukee+harbor+fishing+report PDF link annotation
    • http://hotsales-com.xyz/options_trading_strategies_for_dummiesknmi9.pdfIn PDF document text
    • https://cdn.sqhk.co/reposivekow/enjg4gQ/vidusib.pdfIn PDF document text
    • http://ecoservice-vlad.ru/american_football_uniform_mockup_psd_freeboryo.pdfIn PDF document text
    • https://cdn.sqhk.co/femokuxajuz/MibjjFy/xbox_one_console_black_friday_2020.pdfIn PDF document text
    • http://drilltech.info/zewenonefoxikhgrba.pdfIn PDF document text
    • https://cdn.sqhk.co/daribugubive/sZzmVjh/lagu_whistle_blackpink_korean_ver.pdfIn PDF document text
    • http://weramixizagob.22web.org/basin_listing.pdfIn PDF document text
    • http://jigitozunawada.66ghz.com/28315582572.pdfIn PDF document text
    • http://fridgeservice.ru/contoh_report_internship_uitmsqg6e.pdfIn PDF document text
    • https://cdn.sqhk.co/ratufewebu/BigegiY/the_hangover_alan_quotes_caesars_palace.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zewajus.rf.gd/rakekujuru.pdfIn PDF document text
    • https://6bb2b61b-82bf-473b-8365-63ddb02ddbdd.filesusr.com/ugd/d55797_1e5c317cd6fc4239b3552088e3a00f5a.pdf?index=trueIn PDF document text
    • http://rovuwuruw.epizy.com/23257660232.pdfIn PDF document text
    • http://tewidunutazi.rf.gd/can_mice_climb_sheetrock_walls.pdfIn PDF document text
    • https://77cbb24c-feae-490b-854c-0a9d4db21a85.filesusr.com/ugd/3752ea_32ec724582e447a9b62296374221d638.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0e0495d-cef2-408b-ab35-4671a4bd5d32/semoziluwuzanok.pdfIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_69b283c54f284ef48f75c6a036322e86.pdf?index=trueIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_0440e826e3634df8a4960081a5e881de.pdf?index=trueIn PDF document text
    • http://firosuvidafodi.rf.gd/57943257984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55376951-a87a-4c56-8cae-1aa5e255f70c/30380689261.pdfIn PDF document text
    • http://jidolij.epizy.com/bozojuzemedo.pdfIn PDF document text
    • http://guxozuzemonixe.epizy.com/ben_10_omnitrix_sound.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_off00018ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FF9 5464 bytes
SHA-256: 6969be415c6b50f43b6b2d42bd2485a57e8c1a926969637e1d2a0a7c30ea1206
font_01_sfnt_off0001a2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A2A9 10568 bytes
SHA-256: 1963743d90d724bab12f47398a8473683f7a7fa4dadaeeaaf4973937cc3a373c