Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b371cf01b046542…

MALICIOUS

PDF

78.5 KB Created: 2021-04-07 19:34:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: eafbc187448097123cdbea6e247406c5 SHA-1: b8b96592548869edabdd33c6a5767063ff07c4cf SHA-256: 1b371cf01b046542bf759146c41b0e85444e8edce1d8a53f5d9188140be0936f
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of an SEO link farm designed to redirect users. The primary lure appears to be a movie download, indicated by the URL containing 'asuran+full+movie++in+isaimini'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://vilenefex.ru/123?utm_term=asuran+full+movie++in+isaimini PDF link annotation
    • http://dududuw.mypressonline.com/bobefexezifutolu.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/writing_ability_definition.pdfIn PDF document text
    • https://lulotabo.weebly.com/uploads/1/3/4/7/134745182/f66b337729dbb6.pdfIn PDF document text
    • https://wavoxodasamemat.weebly.com/uploads/1/3/5/3/135348105/c9a7c92a5.pdfIn PDF document text
    • http://kuviruvada.getenjoyment.net/pofalixisajirenuk.pdfIn PDF document text
    • https://saboruxeketeg.weebly.com/uploads/1/3/4/8/134850947/wipazivagine_xazelonojukis_japekavebeku.pdfIn PDF document text
    • http://ditoterelutas.sportsontheweb.net/paulo_coelho_libros_adulterio.pdfIn PDF document text
    • https://lixevinava.weebly.com/uploads/1/3/4/3/134368703/wabokodifax.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/dowavelaxam/80355683075.pdfIn PDF document text
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_bd60cd7b28c94047b81d131badc61628.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vosimalume/trane_tracer_sc_plus.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/68415532381.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/katinofepusizo.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/ciara_level_up_song_free.pdfIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_4f8f6afdd12a40d6b77bff639635df31.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/farezelof/kastorsky_cherubic_hymn_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/milo_cereal_nutritional_information_panel.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/44578717854.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF382 4960 bytes
SHA-256: 2a39ebaa90b901f2a40b667274e576d2dd190d8fa1a9b2cf22a14368ac2b63ce
font_01_sfnt_off00010452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10452 11996 bytes
SHA-256: dd0c332be10e218b56a8002dc585b8ec57a2b50dba98880b0ad601fb68e738c7

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