Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9ed3d0f9c98ff38…

MALICIOUS

PDF

72.1 KB Created: 2021-01-26 12:47:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f9140e68f7400c9ccf606ad3ca2bac7e SHA-1: 9296981585801f40f18563f1b3f0f45ed955aadd SHA-256: c9ed3d0f9c98ff38d3c5cf89ffd044e403a14b49ca7c4f34ce2cbaa10da3cce6
176 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are likely part of a link farm designed to improve search engine rankings for unrelated terms. The heuristic 'SE_CALLBACK_LURE' indicates the document attempts to trick users into calling a phone number, a common tactic in phishing and tech support scams. While no scripts were explicitly extracted, the presence of numerous external URLs and the ML classification strongly suggest malicious intent, likely for phishing or scamming purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://druttle.ru/123?utm_term=osceola+county+warrant+inquiry PDF link annotation
    • https://sevezumu.weebly.com/uploads/1/3/2/7/132710575/1f97598484.pdfIn PDF document text
    • https://povizizumor.weebly.com/uploads/1/3/4/6/134636509/9f023dae291630.pdfIn PDF document text
    • https://cdn.sqhk.co/tufuboloruj/HjdahfH/hill_climb_racing_2_hack_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/xekejegixawo/c4hcmgi/wubopukenafutibe.pdfIn PDF document text
    • https://pevusipifo.weebly.com/uploads/1/3/4/8/134863194/afbc93c0f.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/bjaxgdJ/tap_tap_ninja_jutsu_mod_apk.pdfIn PDF document text
    • https://zofifonanofanap.weebly.com/uploads/1/3/4/8/134876640/e66cf3bb5d18a3e.pdfIn PDF document text
    • https://wetogukonitama.weebly.com/uploads/1/3/3/9/133997956/pojer-lirotis-xofosogifekup.pdfIn PDF document text
    • https://cdn.sqhk.co/bebiwamulanu/a0ibOd5/pimufoxaseriwifeditomugo.pdfIn PDF document text
    • https://vizijupazikek.weebly.com/uploads/1/3/2/8/132814338/5596028.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/miwolezedubujoz/fuxazavowogaxaxerotop.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/88040053731.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/kobexateguzov.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/date_sheet_of_class_12_cbse_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/barash_anesthesia_8th_edition.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_off0000da46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA46 5140 bytes
SHA-256: ecab7c77e185a600cc5692f9bc00948424f61f862e564f20fc64330e578db969
font_01_sfnt_off0000ebed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBED 11828 bytes
SHA-256: 2f9f6b079f204a77392e1bb957f5105e4868b387538476d12bf005c50a994eea

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