Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0fd0bb33be695ae…

MALICIOUS

PDF

77.3 KB Created: 2021-03-29 03:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2e723a29aae587c69ef0f827ba39ebeb SHA-1: 596afbc7740c9960164d6594dfedf5f887669109 SHA-256: a0fd0bb33be695ae6ab07bda101f4b419fba3dd6c2fe8c27256731c3b9cf7df9
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 0.9997

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://dugedepap.ru/award?keyword=spatial+analysis+pdf+esri PDF link annotation
    • http://monongzhlh.space/dr_wahls_meal_plan4r493.pdfIn PDF document text
    • https://vimudizod.weebly.com/uploads/1/3/4/6/134632239/fdf76ac6b1.pdfIn PDF document text
    • http://kmikaerfs.ru/38810773649b50f2.pdfIn PDF document text
    • http://dmgameplan.com/dell_p2415q_4k_monitory6b49.pdfIn PDF document text
    • http://gemofesane.medianewsonline.com/58816387863.pdfIn PDF document text
    • http://preplafond.xyz/84763980406vxo41.pdfIn PDF document text
    • http://lumufurisazela.mywebcommunity.org/senumagu.pdfIn PDF document text
    • http://deladinabixek.sportsontheweb.net/40410820691.pdfIn PDF document text
    • https://naxufagu.weebly.com/uploads/1/3/4/7/134713872/wakavoferorul.pdfIn PDF document text
    • http://wutujirola.22web.org/godepujazixakefozar.pdfIn PDF document text
    • http://rat-red.space/days_cash_on_hand_benchmarks_for_hospitalsjlyvw.pdfIn PDF document text
    • http://islta.fun/zagaduketor3i4c.pdfIn PDF document text
    • http://50off.pro/419580039377v5t4.pdfIn PDF document text
    • https://kazofinuso.weebly.com/uploads/1/3/4/3/134369681/bilafizesafe-rerevajatug-bosesexapavoz.pdfIn PDF document text
    • http://3gusevshop.website/intrepid_new_york_city_tourist_attraction_crosswordioxrn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lekeviwa.onlinewebshop.net/12096774227.pdfIn PDF document text
    • http://romudiforexove.epizy.com/sonazax.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/62092299839.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/medicare_guidelines_for_home_health_care_orders.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/software_engineering_services_bellevue_ne.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_off0000f281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF281 5240 bytes
SHA-256: d0194f0a30683fd010c6faab51fd3c924cb7335f220d17719d10fe4f60f68530
font_01_sfnt_off00010469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10469 10564 bytes
SHA-256: b09ed9f5087a2bb4e3790da4728dda21bd075bbfc6d6788dd1f74a37cbe853ee