Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffaaf2261c92cbe4…

MALICIOUS

PDF

64.6 KB Created: 2020-12-18 07:13:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 68798145a0636434fd1e52a34ca4a112 SHA-1: b9290ed723eb9df176ff09e19a3baedf5ea238db SHA-256: ffaaf2261c92cbe42f71b3a53aef7e47c6d8f2b50be7a7af97fc91a426027b8a
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cctraff.ru/123?utm_term=craigslist+san+diego+poodle In PDF document text
    • https://petenugilamabo.weebly.com/uploads/1/3/1/4/131453278/rabudep.pdfIn PDF document text
    • https://pozegitewo.weebly.com/uploads/1/3/4/7/134758724/1048496.pdfIn PDF document text
    • https://rizaxulizogi.weebly.com/uploads/1/3/4/7/134753796/vewojixabanovi.pdfIn PDF document text
    • https://tozuxixawijere.weebly.com/uploads/1/3/4/5/134523333/c05a25f48.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea46624d-4c5f-48f6-9c9f-81690adfacc9/48942257118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f2c2abe-3ecb-479d-863d-4c364697b67d/mario_games_google_search.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cabf33e4-e1c0-4c3d-a0a9-01fae5589185/orlando_ballet_school_drop_in.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17593560-b7a0-4ea6-8721-5ada70e75471/zilibabegujezapip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b617b09-1718-4f7d-a719-310c4e1b7ece/36296796686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05143aa9-870c-47a1-acbe-20137f9afd99/zijawudasewizifun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e70d35c9-4de8-4512-9240-32eac5e2e15a/tizulowojuli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3725865e-a617-41ab-a158-19650cdc0b83/xugapubigoninuvizovavazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f923e89f-c1ba-41f1-8a7b-886373a3cebc/60072403983.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_off0000bf39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF39 5032 bytes
SHA-256: b8d5118a84515fbe99c95f6b9d18ecaa739226e634b63f6f29998235562ad2d8
font_01_sfnt_off0000d062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD062 10984 bytes
SHA-256: 18a991308b1809edc079176216fa3ba25ef673c752f503483a791dc563e33c44

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