Malicious PDF — malware analysis report

Static analysis result for SHA-256 02c2721cf15afe4d…

MALICIOUS

PDF

75.4 KB Created: 2021-02-02 18:01:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 3989d5fb1837fd741ac3f46ea0c6d2b1 SHA-1: 2345a66e8fa94978d6357c41a5b4d11a97c9e45d SHA-256: 02c2721cf15afe4da31599588788c6710885ecd6537af828cc082505aff992ee
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to 'maypoin.ru' and disguised as Medicare evidence of coverage. This strongly suggests a phishing or credential harvesting attempt. The ML classifier and ClamAV detection further corroborate the malicious nature of the file, indicating it's likely a phishing or trojan delivery mechanism.

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://maypoin.ru/123?utm_term=myaarpmedicare+2020+evidence+of+coverage PDF link annotation
    • https://cdn.sqhk.co/purovufizu/VhgOjby/nadavegatuwusopafapajupog.pdfIn PDF document text
    • https://cdn.sqhk.co/medukukekuke/9Kf3kTT/dusttale_frisk_x_sans.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/ia7iahf/lujonenokonig.pdfIn PDF document text
    • http://vknart.xyz/guide_des_bonnes_pratiques_cliniques1xqnb.pdfIn PDF document text
    • https://cdn.sqhk.co/dopuwene/aienied/pugonowiwofipapik.pdfIn PDF document text
    • http://sport-stavki.fun/ganatinumobozaxenetaxun2z.pdfIn PDF document text
    • http://dobewobezusisof.iblogger.org/71921769679.pdfIn PDF document text
    • http://sluzhba1.net/vexogidumakukipatuvusuvon6nbb.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/ihjfhdx/ritikizinobidibabi.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/ArZjhRS/snes_classic_wireless_controller.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/fhfXyjc/dinuruwonuzel.pdfIn PDF document text
    • https://cdn.sqhk.co/zanaforare/1TeTge6/rank_one_forms_yisd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kigavanus/wusurajasifoziv.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/chelsea_vs_liverpool_today_match.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/foxodemusakawaxeverofilom.pdfIn PDF document text
    • http://bukinajomo.epizy.com/rawuvizifaxesanesesi.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/vosekunimefutid.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/labour_only_building_contract_template_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/catonsville_weather_report.pdfIn PDF document text
    • http://lexojowal.epizy.com/17783135667.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_off0000e6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E3 5708 bytes
SHA-256: fc1785de4b65dff1a982eb79e3f3d65e803e6de97c64ca270718350a0c7d244e
font_01_sfnt_off0000fa5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5F 11060 bytes
SHA-256: b41bcfea1afd51edbec666adbf2cd389140c0460cba4650393720781abdcda98

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