Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1fa16b0e75f0ce…

MALICIOUS

PDF

67.6 KB Created: 2021-02-03 00:02:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 277441f5aa6c9bcfbfcbbee70d0e8c73 SHA-1: 734fcaee98c6b6a099f4d7fff16d1407ab32cc12 SHA-256: 9d1fa16b0e75f0ce25db0a3a8058394ea5bb7c079ff43d7e69235df616a97710
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of embedded URLs and the PDF structure suggest an attempt to redirect users to potentially malicious websites, likely for further exploitation or credential harvesting.

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
  • 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://leonvi.ru/123?utm_term=living+with+the+himalayan+masters+tamil+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388156/normal_5fd0a0373722b.pdfIn PDF document text
    • https://vuderuxedus.weebly.com/uploads/1/3/4/6/134692959/6643970.pdfIn PDF document text
    • http://copyright-services-us.com/duwazedidud5ymof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384484/normal_5fd8441e5f4de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425726/normal_5fe15611bfebc.pdfIn PDF document text
    • https://sodefabufu.weebly.com/uploads/1/3/4/4/134473286/xitowo_negovikipisoxo_sekowepovibujim.pdfIn PDF document text
    • https://cdn.sqhk.co/sulugedako/Q8jfic4/pokeball_plush_target.pdfIn PDF document text
    • https://sukutunog.weebly.com/uploads/1/3/5/3/135304197/bejutugosewabid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482415/normal_6006f8390235c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426409/normal_6008dfb4c42b0.pdfIn PDF document text
    • https://xutativapejan.weebly.com/uploads/1/3/4/5/134521393/kajudevopam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rufonali/call_of_heroes_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/xofob.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/blackbird_tab_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/64681814212.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/fafudexufitoxirora.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/38480516274.pdfIn PDF document text
    • http://www.4shared.com/office/lbKXkB4I/living-with-the-himalayan-mast.htmlIn 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_off0000c998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC998 5648 bytes
SHA-256: 39c316161ac1dbed2733f79b572807b977379f37d7fde90ab341f27445549cc1
font_01_sfnt_off0000dcc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC3 10412 bytes
SHA-256: 38a3f4355b309cad33b443b94bcd700e948d120feda38451a97ff2d7af4049c4

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