Malicious PDF — malware analysis report

Static analysis result for SHA-256 53873f806c3ebbc7…

MALICIOUS

PDF

83.0 KB Created: 2021-02-08 06:57:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a7dc4a8d277521cdabdf866a844eb32d SHA-1: 86faaa09ca24166f4a10afd7bf3a793d3e7e1e6e SHA-256: 53873f806c3ebbc7129dc3294504ae0048aa0390b9618729bf54ab63275a911c
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://maypoin.ru/wb?keyword=interspire%20installation%20guide PDF link annotation
    • https://cdn.sqhk.co/demanajinu/Gu6jfrG/jujikegudemujatepekivatel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383582/normal_5ff70ac8ed579.pdfIn PDF document text
    • https://cdn.sqhk.co/tolononof/ejfhb3A/sadavowikuxez.pdfIn PDF document text
    • http://instasurprise.online/tezudosiwadizorizune2nc.pdfIn PDF document text
    • https://cdn.sqhk.co/rubutemoxe/Gnghyif/terrible_math_teacher_super_duper_ultra_slow_mode.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492272/normal_5ff0bc96544bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461498/normal_5fda7eb47ec0a.pdfIn PDF document text
    • https://cdn.sqhk.co/panosiritu/hdge6cB/83351099767.pdfIn PDF document text
    • http://usmileofficial.site/dissertation_sur_le_civisme9ghb7.pdfIn PDF document text
    • http://totalcreditcheck.info/usb_barcode_scanner_software_free6rtbv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417834/normal_601d5c3438c45.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dizoran.epizy.com/13883877422.pdfIn PDF document text
    • http://juxugalipexobow.epizy.com/84524883996.pdfIn PDF document text
    • http://kugofabafomozo.epizy.com/driver_booster_32_bit.pdfIn PDF document text
    • http://puxedasepuk.epizy.com/malayalam_movies_2019_sites.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_off0001077d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077D 5064 bytes
SHA-256: adbb40ccff5ca63f548996c339116b4edb6cfadc99055dd34409778f54943379
font_01_sfnt_off000118bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BF 11288 bytes
SHA-256: ba3ea493b57e1a0f1c634fe012bb6d8f6106920fa5b561ff54e3ee27be50df45