Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95766a3ce110578…

MALICIOUS

PDF

92.4 KB Created: 2021-03-19 07:01:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbbeeae997d72fd480ace59554aa2e9d SHA-1: 7699750fcb28b0fa241759cc70d3849c4eefdf1a SHA-256: a95766a3ce110578ecb02c7b4097549203558dd48bc1f2c7827258e926471845
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical PDF_SEO_LINK_FARM rule indicating a large number of external links, and ClamAV detected it as Pdf.Phishing.Trojan. The presence of embedded URLs and the document body mentioning 'Vidmate for android 2.3' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and link farm indicate a high likelihood of malicious intent to redirect users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nipisod.ru/123?utm_term=vidmate++for+android+2.+3
    • https://cdn.sqhk.co/xagogudexo/haZYigd/lemakade.pdf
    • https://bugalesatu.weebly.com/uploads/1/3/4/3/134309104/seriwenipolaka.pdf
    • https://mutakisutuw.weebly.com/uploads/1/3/4/7/134768563/5833740.pdf
    • https://cdn.sqhk.co/raxoxawupej/SjbgiqN/pokimumexowolekajunev.pdf
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/f169795368.pdf
    • http://xugilerasifoveg.22web.org/prepositions_of_place_exercises_intermediate.pdf
    • https://pezujereg.weebly.com/uploads/1/3/5/3/135349759/pedonodawaponob.pdf
    • https://vapurexox.weebly.com/uploads/1/3/4/8/134865026/8317003bc7e.pdf
    • https://kifezitiwiwafu.weebly.com/uploads/1/3/5/4/135400929/5657845.pdf
    • https://wojawodexof.weebly.com/uploads/1/3/4/6/134673733/4495257.pdf
    • https://cdn.sqhk.co/latosagax/cQjfiey/barrett_jackson_auction_2021.pdf
    • https://zegepefuloruwan.weebly.com/uploads/1/3/4/0/134012378/9d24ef5219ca.pdf
    • https://cdn.sqhk.co/metumolalub/UPidzig/pew_pew_iphone_hack.pdf
    • https://vulewerogoxo.weebly.com/uploads/1/3/4/5/134507491/magefotezidubenef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gazemopu.rf.gd/43759868635.pdf
    • https://uploads.strikinglycdn.com/files/41ca6de2-82cf-4479-bee8-e568ae518898/75669969005.pdf
    • https://uploads.strikinglycdn.com/files/e1792c74-7a90-446f-af48-aceb97d5525b/authors_purpose_graphic_organizer.pdf
    • https://uploads.strikinglycdn.com/files/a7bdbdd7-0497-48ed-be0e-e38a590540d5/joseph_smith_jr_lectures_on_faith.pdf
    • http://jajojukadas.epizy.com/causative_sentences.pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00013918.bin
001f73c02cce888e6f20caf2d946ebce0c4c61992adce645cb396c2b9f874efa		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13918 24756 bytes
font_00_sfnt_off0001025e.bin
5a9447af77b670c3d714e5a112d361f8990b121ed1cae1df07de28e67d31fd58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1025E 5136 bytes
font_01_sfnt_off000113cd.bin
d016dacbea772aafa2640d49d71140724943a669a19e2bce68054b2b8c6ed7ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113CD 11356 bytes

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