Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4565e14ddfc54e3…

MALICIOUS

PDF

79.5 KB Created: 2021-04-02 00:43:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 097e7fc8a059cbf5172a09e4792d6197 SHA-1: 24bf55d322e8f0ef98bd5c2de2cbc5623d228299 SHA-256: f4565e14ddfc54e3bab88ca68b9fdaa4514bef8e2e9e827bb2c4b8e0435bb513
176 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, with one pointing to a suspicious URL. The 'SE_CALLBACK_LURE' heuristic indicates the document may be designed to trick users into calling a fraudulent number, consistent with phishing or tech-support scams. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://soxebez.ru/strik?utm_term=pioneer+sx-950+value PDF link annotation
    • https://sefoxobifi.weebly.com/uploads/1/3/6/0/136093232/juzivox.pdfIn PDF document text
    • http://dekoriribazovax.mywebcommunity.org/clinical_biochemistry_questions_and_answers.pdfIn PDF document text
    • https://tifixexeruwa.weebly.com/uploads/1/3/2/6/132682204/3774b.pdfIn PDF document text
    • http://vekowen.getenjoyment.net/99152411635.pdfIn PDF document text
    • https://lovebaxubifutu.weebly.com/uploads/1/3/4/3/134322000/dorisefejus_zitumosiberuk.pdfIn PDF document text
    • https://vomalutexoj.weebly.com/uploads/1/3/1/8/131871655/juzubelewif_radizefebiw_sopopi_vabawisiwepi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7c3a386c-9197-44ff-a2a0-26a6be1b6260.filesusr.com/ugd/bba797_cdd306c18c92490f96d1aa297c48fa9c.pdf?index=trueIn PDF document text
    • http://zanalonum.rf.gd/zoramibavijuvun.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/vifegufadumofekid.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/4776988866.pdfIn PDF document text
    • http://tofujuwo.onlinewebshop.net/hrm_definition_by_flippo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d203146c-056c-446d-96d5-99bad2047b21/kubixev.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/bumikof.pdfIn PDF document text
    • http://tikixowogozomi.epizy.com/sumalerisinuwotudumidabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5d8d08a-77f3-4912-96f4-c1fdfe961873/97139638252.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/magnetism_worksheet_for_5th_grade.pdfIn PDF document text
    • https://2acf176d-1645-44e4-83be-c67f7ac9af6b.filesusr.com/ugd/e72dd6_6da8c86033864cf69e6766d9d297102f.pdf?index=trueIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_16ac68c5f164497fbaba9f88a679420a.pdf?index=trueIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_6fa1c8273839493a9faedfac5dc72fca.pdf?index=trueIn PDF document text
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_b1209a947d4d49e49153b6ebf30d3a18.pdf?index=trueIn 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_off0000f924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF924 5264 bytes
SHA-256: 630df542b0ef575c7a5d6ead727645893da355ade52f7d15cc0d258bbf8ba366
font_01_sfnt_off00010b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B29 11180 bytes
SHA-256: 5f1c445189dcfa05fa16577fb6f7fef05a49dde534ea7dfa33498960413000c2

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