Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b09b396c808ac4b…

MALICIOUS

PDF

82.1 KB Created: 2021-05-24 01:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: cda77aa797c501cd8b520400288441e3 SHA-1: aaab34c94ee7c9e8f400f63d5294248adac01278 SHA-256: 8b09b396c808ac4b7dd240b378dc5ebac5639919345c9d7fe38089b45eb39e2a
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 SEO-optimized and point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The primary malicious URL identified is dugedepap.ru, which is likely used for phishing or to serve further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=assamese+film+kanchenjunga+full+movie PDF link annotation
    • https://tagenomamoz.weebly.com/uploads/1/3/4/4/134476715/vutozawivuref.pdfIn PDF document text
    • https://kajimawujejava.weebly.com/uploads/1/3/5/3/135348493/josenipaviz.pdfIn PDF document text
    • https://bugagage.weebly.com/uploads/1/3/5/3/135330359/1883051.pdfIn PDF document text
    • https://teretusux.weebly.com/uploads/1/3/4/6/134687242/natezusexibomozapuw.pdfIn PDF document text
    • https://kexexetipo.weebly.com/uploads/1/3/4/8/134897314/rolamorugiwaki_dizifiluzutev_nuzesavew.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/wuxupewu/how_to_make_him_chase_you_again_in_a_long_distance_relationship.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/9867273747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa028cfe-ed6a-4463-9f65-bb41f8e08712/34808494797.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/dedojaxubasowawoloku.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/wefezevuroxofedi.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/twelve_days_of_christmas_lyrics_pentatonix.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/sibigavetigulofam.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/jofisore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5329b17-dabe-4ce2-8193-601b019761fd/15406220851.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/php_change_date_format_month_name.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/new_albums_hip_hop.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/momavarolufozunixopibik.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61A 6416 bytes
SHA-256: a497fc52ef216d2369a1cda088bdeb49e1b2edea4e2999984a7939df6a238a3e
font_01_sfnt_off0000f5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E4 5388 bytes
SHA-256: 8edfb8ef03edfc2d01ed6d543d03a076a8b926cfc216cf35cf768ceecbde9e54
font_02_sfnt_off00010826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10826 4804 bytes
SHA-256: 56c8281fb913cf631c78a64f3671306da8742b3b65a1413377e4cd730fab4f01
font_03_sfnt_off000117c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C6 10404 bytes
SHA-256: 48fb112423bc2ea33d913cbe0484016d8aa3a252bdd4751860467319e2569f0a

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