Malicious PDF — malware analysis report

Static analysis result for SHA-256 324eac85b933fb07…

MALICIOUS

PDF

79.9 KB Created: 2020-11-25 11:04:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0e8eb489316f34b66d1ed0474c23d89c SHA-1: bce580c2d9fc6ec83aed4c8681e8d492ffcd55de SHA-256: 324eac85b933fb076007628eb7a59d129c1ef8121620f36c0f64728d7d2c2088
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a link to a known malicious redirector, suggesting an attempt to lure users to download unwanted software. The document body, though heavily obfuscated, contains text related to downloading screen recorders, reinforcing the phishing lure. The presence of numerous external PDF links, many pointing to benign content, indicates a potential SEO link farm strategy to boost the malicious redirector's visibility.

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/strik?utm_term=download+screen+recorder+-+no+root+apk+for+android+kitkat In PDF document text
    • https://nazuvunu.weebly.com/uploads/1/3/4/4/134438845/4569673.pdfIn PDF document text
    • https://bajusumuke.weebly.com/uploads/1/3/2/7/132741128/ripifotenero_kilipir_tawugimagip.pdfIn PDF document text
    • https://luxoxika.weebly.com/uploads/1/3/4/8/134899107/saxutimawije-nubegakik-tirakogewefuj-tetuwawise.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/581bb73e-b8d8-479b-b30c-fa3f622f5bdc/woman_of_the_woods_lee_county.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a7c5b13-d559-42dc-ad7a-14ef025cce74/27699223531.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c4448fb-1b9b-4f91-983d-1c0780862aab/disutagimijakeneruzanamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e7fc0bf-1238-4d81-a6af-a000c0c955af/82588194018.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/13292834116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9f4f7bc-b3a1-4db3-9bff-e3993120e840/conditionals_grammar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2272eef0-5304-4ea7-b360-25f998a59a1c/42431209591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24f39d8a-8030-4f16-a7c5-ce4555883f3b/polk_audio_atrium_4_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b84eb8e3-c62b-4dc5-bb73-bc832899779a/rerujesetikowepezoza.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40A 5336 bytes
SHA-256: b7dfbc36034efbb00cd1ba2e92603cc2392718dfe6641f03c39f4e4304f10382
font_01_sfnt_off0000f665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF665 10832 bytes
SHA-256: c38295d3de71f152eac2d3b035c75e00262ed5a01839747ad9822c6e92d97e33
font_02_sfnt_off00011bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBE 16068 bytes
SHA-256: 912e8c3c37b183d760f7f382ef110bdca05c7793b62d2efdd5772423ec248018

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