Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d7dadcfe6c5707a…

MALICIOUS

PDF

79.8 KB Created: 2021-01-04 20:17:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: f22cba7ff657cdf04b4b39d1bb10eb2d SHA-1: bac48360a07be2fbd73c150613e3d3219c211d94 SHA-256: 2d7dadcfe6c5707aa206225aad3ec1d3c04cfda62afb5c5bc08afb2e8bc6f253
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure and link farms, indicating a malicious intent to direct users to potentially harmful sites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan. No scripts were extracted, but the primary attack vector appears to be the malicious redirection via embedded URLs.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/aws?utm_term=science+teacher+interview+questions+and+answers+pdf In PDF document text
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/pefobifebuwi.pdfIn PDF document text
    • https://xavuzilutose.weebly.com/uploads/1/3/1/0/131070872/6bbc9f4a6739.pdfIn PDF document text
    • https://cdn.sqhk.co/kisunika/gchidEW/xojatenejegikaxitoforexa.pdfIn PDF document text
    • https://zoparidozuxeb.weebly.com/uploads/1/3/5/3/135390671/6082324.pdfIn PDF document text
    • https://cdn.sqhk.co/ganidabizi/jjeoAhd/magic_castle_hotel_popsicle_hotline.pdfIn PDF document text
    • https://cdn.sqhk.co/bedogipaxog/jbYiKje/mini_race_car_track_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/gfLjawU/leturimekakinada.pdfIn PDF document text
    • https://mukekevujawova.weebly.com/uploads/1/3/0/9/130969498/cbe5c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7510badc-05af-4225-b285-4095564ea746/81876312030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/588b4538-a5f2-4b2e-882e-51ffb6ee48d4/renew_teacher_assistant_certification_ny.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_off0000fad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD2 5592 bytes
SHA-256: a954c9ddc05b451447aace5c77bae5eb32bdecbe0381540ec676429a9052f992
font_01_sfnt_off00010dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEA 10716 bytes
SHA-256: 6563654ee6a6382a042d78388940c50dd62271dbe7505479fe297c0dac0a0614

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