Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e35bb802f985eca…

MALICIOUS

PDF

70.8 KB Created: 2021-02-04 07:36:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f8a7f5d43711779921b3cfdcefb7ff96 SHA-1: 4d201249eaffd58ce918670b235f90cc7149898d SHA-256: 6e35bb802f985ecaa4dc5447251b922edffc755150427b4bea8af02d139b7f67
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/aws?utm_term=accounting+information+systems+study+notes PDF link annotation
    • https://cdn.sqhk.co/kezavilageg/edjfgjT/80625574606.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/j9fibr4/70457254206.pdfIn PDF document text
    • http://nafuvexozoli.iblogger.org/soundcloud_pro_apk_mod.pdfIn PDF document text
    • http://bevojufonurol.iblogger.org/carroll_diagram_worksheets_ks2.pdfIn PDF document text
    • http://losmopaka.site/ielts_reading_full_testk8s9y.pdfIn PDF document text
    • http://unityfree.xyz/93370519684e6gpw.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/jfo4jcz/6143232930.pdfIn PDF document text
    • http://jogemijafiw.22web.org/aparichitudu_telugu_songs_ing.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/iezKiel/58802065132.pdfIn PDF document text
    • https://ruworelolovifuf.weebly.com/uploads/1/3/4/4/134462917/suzugidulukafoxofora.pdfIn PDF document text
    • https://cdn.sqhk.co/lamajemomu/NFjdjic/chisel_and_bits_mod_1._14._4.pdfIn PDF document text
    • http://sasezifunapa.iblogger.org/december_1st_weather_report.pdfIn PDF document text
    • http://sweetmeet.online/zarudutofedivovisukobixedmdrfe.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/jarirotexab/49592699908.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/38923998692.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/zapowilatinokiti.pdfIn PDF document text
    • http://kitukogoxav.epizy.com/65129593392.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/wuxisotedavokopatosotux.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/video_bts_fire_mv_mp4.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_off0000d81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81D 5400 bytes
SHA-256: 982bc5eb5783e666d9b9d3e3140312ef14b65f495c11ef596fb144ae7c3e20e1
font_01_sfnt_off0000ea72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA72 10392 bytes
SHA-256: d42842b41c0bf6be6c05a19f40e84dadb9dec1b7b4d86f2bb3ebd0609011d17a

Open this report in the interactive analyzer, or submit your own file for analysis.