Malicious PDF — malware analysis report

Static analysis result for SHA-256 61e859e160e6f6a6…

MALICIOUS

PDF

77.6 KB Created: 2021-07-09 07:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4f968d4e472ba9ec0df62d018b0d907 SHA-1: 27fb420ee1060f125eac9ce0991f740797e8ff09 SHA-256: 61e859e160e6f6a6d815806e95d1657758a9b4ace4a1f396edf916542d714036
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The 'SE_CALLBACK_LURE' heuristic indicates the document attempts to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to lead users to malicious content or initiate fraudulent communication.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cdn-cms.f-static.net/uploads/4457620/normal_60419847c29a8.pdf
    • https://cdn-cms.f-static.net/uploads/4454303/normal_60477016dd37d.pdf
    • https://tuvajidemagik.weebly.com/uploads/1/3/2/6/132681445/wasuxegaj.pdf
    • https://cdn-cms.f-static.net/uploads/4386609/normal_605bfe53adb6a.pdf
    • https://malinozibide.weebly.com/uploads/1/3/4/3/134380659/4e205f21.pdf
    • https://static.s123-cdn-static-d.com/uploads/4423136/normal_60b06452c09e2.pdf
    • https://static.s123-cdn-static.com/uploads/4386851/normal_5fe56d0813a72.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/sq/ugae/~3/EjZ5HCEZs_A/square?utm_term=treatment+for+sociopaths+and+psychopaths
    • https://uploads.strikinglycdn.com/files/bc509e63-1145-4fea-a67f-c8857810ee4f/how_to_set_a_waterboss_water_softener.pdf
    • http://xipulopunag.pbworks.com/f/malachi_martin_books_free_download.pdf
    • http://beratirupo.pbworks.com/f/77375294357.pdf
    • http://rujuboxu.pbworks.com/f/munuvibupawokarajam.pdf
    • https://uploads.strikinglycdn.com/files/e921afe4-ac44-405c-b7a7-014662c79498/ue_megaboom_speaker_charger_charge_port_pcb_3.5_mm_board.pdf
    • http://wezenibafasi.pbworks.com/w/file/fetch/145164732/kezuxoxusipuxubirosabe.pdf
    • https://uploads.strikinglycdn.com/files/a964bb7f-48c9-4f08-821f-23494c49b56f/who_hit_brandon_burlsworth.pdf
    • http://labidan.pbworks.com/w/file/fetch/144447312/mikigox.pdf
    • https://uploads.strikinglycdn.com/files/622bb942-a46b-4df8-a78c-ab51fef4727b/jumofa.pdf
    • https://uploads.strikinglycdn.com/files/6a8adab3-b362-4d87-86da-3c31914b28c5/jeletovazofipufusugexaso.pdf
    • http://barumena.pbworks.com/w/file/fetch/145272654/68869635571.pdf
    • http://pezeliv.pbworks.com/f/papelovumaneximog.pdf
    • http://nolumemonip.pbworks.com/f/school_receptionist_cover_letter_sample.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3dc.bin
5b53df4a0a1b51b4052310dab7a37d9d2820ddb82c15ea17e0b37c1e29114b99		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DC 5204 bytes
font_01_sfnt_off0000f563.bin
6abed795a4331034fb41adfbd0261564b24bc5e1747deb4129d5cbb90e0d1e0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF563 10820 bytes
font_02_sfnt_off00011a79.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A79 4324 bytes

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