Malicious PDF — malware analysis report

Static analysis result for SHA-256 f395abed83c60101…

MALICIOUS

PDF

82.9 KB Created: 2021-03-25 08:10:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12855765c35375afdc29e9c58a197086 SHA-1: 24bad011161e08f9c44e3ca6f61aa5fdc8908367 SHA-256: f395abed83c60101a493e25cf94c23ccb1e10c03c1e9d136fbedd444be4c5d28
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farm or phishing schemes. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of the file, likely involving redirection to phishing sites or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/wix?keyword=glencoe+precalculus+chapter+3+test+answers
    • http://miwasigal.mywebcommunity.org/abu_garcia_black_max_combo_academy.pdf
    • https://pegugaxuxidugif.weebly.com/uploads/1/3/1/1/131164321/9152932.pdf
    • https://voxipomawo.weebly.com/uploads/1/3/1/3/131379395/8987014.pdf
    • http://vajukadezazi.getenjoyment.net/how_to_learn_android_programming_step_by_step.pdf
    • https://xivovawa.weebly.com/uploads/1/3/4/8/134875493/1520953.pdf
    • http://kotudekudoges.getenjoyment.net/accidentes_de_transito_en_costa_rica.pdf
    • http://kijekidajefi.getenjoyment.net/html_tags_list.pdf
    • https://biteledazuxol.weebly.com/uploads/1/3/4/3/134315761/4878045.pdf
    • https://bodonoweti.weebly.com/uploads/1/3/1/8/131856710/7732649.pdf
    • http://nebofonuve.mywebcommunity.org/70990651736.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_a3c8e5dd43b44c0b98aaa35d5bf1d388.pdf?index=true
    • https://s3.amazonaws.com/dofufiri/manushyata_poem_questions_answers.pdf
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_537b92fcce8f4f428446eeadbecf2576.pdf?index=true
    • https://s3.amazonaws.com/bisute/42364716149.pdf
    • https://s3.amazonaws.com/tuxenipup/mefixalegu.pdf
    • https://s3.amazonaws.com/bubeto/60611376323.pdf
    • https://s3.amazonaws.com/tabobujimo/cadence_virtuoso_layout_editor_user_guide.pdf
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_307015dcee8a48c4bee46154ab224c85.pdf?index=true
    • https://s3.amazonaws.com/jemisajoda/dudanexusimoguto.pdf
    • https://s3.amazonaws.com/pasawe/pejojedamutuvuxosowakik.pdf
    • https://s3.amazonaws.com/sitozi/39789908077.pdf
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_eb6af8bcfd5941a887664fe9cbca97f3.pdf?index=true
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_0c9bd97bbb56410684c77285d7b967f6.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010261.bin
0bb9ef9f6d49029bcef8e1e922d8be29057b1a444fb32b95721a3a7436e90cdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10261 5308 bytes
font_01_sfnt_off0001147e.bin
c160c9e55c7114b417e83f43013eccc44c38cd53b85402160fc38aae6a667ca1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1147E 12220 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.