Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37ba8f578e3a232…

MALICIOUS

PDF

97.8 KB Created: 2020-12-19 03:32:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e2e7abcd6f78123518b6d4d8ae1cb5b5 SHA-1: 2cfb662ef75d114e26e2c3d3dc7915e855b0ec64 SHA-256: d37ba8f578e3a2320a490fe27147bf516dd1e50d72f0956b1faf16d91aecba75
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are to suspicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate maliciousness. The primary URL, trafftec.ru, is likely used to redirect users to malicious content, potentially disguised as a search result for a specific PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://trafftec.ru/strik?utm_term=learning+the+pandas+library+matt+harrison+pdf PDF link annotation
    • https://kafubururi.weebly.com/uploads/1/3/4/2/134235359/volinob.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bagatazojiz_sidatasofugugor_sofaxazute_gureluf.pdfIn PDF document text
    • https://niwurakoj.weebly.com/uploads/1/3/4/5/134588258/e6dc75c7a5e2.pdfIn PDF document text
    • https://zadujemerumid.weebly.com/uploads/1/3/2/6/132695269/1117309.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/5fdd37006394b41d6424d862/t/5fdd48447514fb3b762c1445/1608337477744/paintshop_pro_deform_tool.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52335cd1e280355efa049/t/5fc66a8c9ee0f32b8730b4c8/1606838925858/topekewapitipuwoge.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51de668612547ed794755/t/5fc7d4f48c4551503ff173ff/1606931705642/roblox_dog_simulator_code_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/28009279930.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/o_reilly_understanding_the_linux_kernel.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/60940659161.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/pokemon_planet_guide_2018.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4ec032cf09257bd856c41/t/5fd67cab164d0f203c7f9f47/1607892140406/wowib.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcee10d4d27a4470988bf0e/t/5fd653153ebe0416315d81d4/1607881494076/57637187975.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/aj_addon_kodi.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/frederick_brown_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/minecraft_apkpure_mirror.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000153ff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x153FF 22004 bytes
SHA-256: 2dc93480629fa6293be9112c26f97f81eef582fa48c922302abdc2f64a0534f1
font_00_sfnt_off0000daf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF2 19416 bytes
SHA-256: 1325b875cbac3bb790a055b9084cdfa803131580d94a25463c997e27f18e29fe
font_01_sfnt_off0001199d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199D 5640 bytes
SHA-256: b36aa9227bc931e3d42d14fc30cda70168216a33f83f93f733a3b84c0b1d0f75
font_02_sfnt_off00012ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA7 11768 bytes
SHA-256: 08783a2d61ecc9353ac99ff0d8391cac6763ac338f882f2c151c860e539fa62b

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