Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f3752c3dcd861b…

MALICIOUS

PDF

77.8 KB Created: 2020-12-16 18:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: d4c220c7733aaa7028790f9dd6f7921e SHA-1: 4fae24b06133c5a106b2cd2def7097a327303a94 SHA-256: f2f3752c3dcd861b6656e4f6ce4db9630f10135b538da1ed55e5e06fc586a013
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of a link farm heuristic suggests an attempt to manipulate SEO or distribute content through a network of linked documents.

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://gettraff.ru/aws?utm_term=burma+cubensis+trip+report In PDF document text
    • https://raboxodibol.weebly.com/uploads/1/3/4/0/134096122/88fe6121f9cc0.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/lowamixokiru.pdfIn PDF document text
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/kotuzulega_pumalasa.pdfIn PDF document text
    • https://xexovelez.weebly.com/uploads/1/3/0/8/130813416/4964160.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc6a6afc6229360ecd4fc1b/t/5fcdd6961e1a4d7de14c6f15/1607325335401/binoxalakolokesa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d8fe403f5353fdb77b13/t/5fd60b69ab1a676c72845bde/1607863146188/honeyguide_nepal_review.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d4b9e5c7695ca9b4bda1/t/5fca2ad5887b444c615f12e5/1607084758318/adorable_home_game_cheats_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e98484df-8dfc-4325-b031-f0af43797915/63615356492.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15bd3ff13940aa242d827/t/5fc308f76457125654a06182/1606617337728/10452477176.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2d442e9fc3622d52eb2cd/t/5fce82dde3c49334ae32fa34/1607369437962/fufekasulanowejujeweduve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77b158a2-f7ba-4815-8e4a-5fe4a15430d3/36262986630.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/7345185747.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/47621781889.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6afc95e8e827d42b66858/t/5fc859c313de6e798157cfc2/1606965701870/sugar_skull_wallpaper_iphone_x.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_off0000ecd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD3 5236 bytes
SHA-256: c7fddeb1f06fb26358ddc4b978565275dd432286fa22deddbac89f39d5dfa2f7
font_01_sfnt_off0000fe79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE79 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off00010707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10707 10632 bytes
SHA-256: c59f151137e11e9f4d559cceece708e3224829fd5efd8aa495a4874997233515

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