Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f58e67da52380a…

MALICIOUS

PDF

75.4 KB Created: 2020-11-17 15:53:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e8cf0618fa69df55f5160aa7d9bbb863 SHA-1: 1daeacc4fb7dc337fe9d8ce2059a47464c941d88 SHA-256: f2f58e67da52380a0c7e504c498b3f8b8ab12537cb066cce2335aefed5c59dd8
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The presence of many external links suggests a link farm or phishing attempt designed to direct users to potentially harmful websites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/123?utm_term=temas+para+charlas+de+seguridad+en+construccion+civil In PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/jazojowadekitek_sotazalanedanux_puzaperen.pdfIn PDF document text
    • https://vodiwisilob.weebly.com/uploads/1/3/2/6/132681054/dc89f629cd385.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/379ba783-a4f5-483e-a862-b3658debc698/tumokamabadugofapukelafam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1b3b29c-d618-4efa-b26b-693e1dbb09e7/wufupojisuviv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/677838fc-c8df-4a8b-86ec-9b4e82c88a98/48188271028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a61c86ac-e12d-4db8-9252-7c3dbe1d9649/ingenieria_en_biotecnologia_unadm.pdfIn PDF document text
    • https://s3.amazonaws.com/sirasu/30641627116.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/ccac_transcript_request_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d522ca9-7de8-4ad2-b366-249d2ca61670/waserop.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/rovufixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d941ccea-3118-447c-a121-add31abad6bf/8413950754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ca1d960-53e6-4bd0-abc3-98a2b9333a4c/48021925721.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d87a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87A 5380 bytes
SHA-256: 9f43f0611104ff182bd6a7baeae7e3f91b5aeb362329c0c5c93c8d71fad7cfee
font_01_sfnt_off0000ea9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9D 11656 bytes
SHA-256: 849da7a8db866bfc9cb6ed1d35e527d0a0c8057308d6d977cb5aa03c2f682b59
font_02_sfnt_off0001102f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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