Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00f4a6cc9efcd63…

MALICIOUS

PDF

80.0 KB Created: 2021-03-20 05:25:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 80af30be102ac64d50c230d107225179 SHA-1: 58cd4c38b9bfb9b13f307a0b54284ac192eed623 SHA-256: d00f4a6cc9efcd63352d02e8ede3050afe55d5c80059f31facecf1496b66e656
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a deliberate effort to create a network of links. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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/123?utm_term=funeral+card+template+word+free PDF link annotation
    • https://kafolegilu.weebly.com/uploads/1/3/2/3/132303068/6584548.pdfIn PDF document text
    • https://dafemiperufukoz.weebly.com/uploads/1/3/1/3/131379503/3984400.pdfIn PDF document text
    • https://vatikaleme.weebly.com/uploads/1/3/5/3/135386674/tulal.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/LRifgeb/towudopamobotupoguterabu.pdfIn PDF document text
    • https://cdn.sqhk.co/gefisodir/PibjdeE/hit_songs_of_90s_bollywood.pdfIn PDF document text
    • https://cdn.sqhk.co/ramejolir/9uPaEgf/babarizi.pdfIn PDF document text
    • https://cdn.sqhk.co/tenotitur/cifgi4m/wixaxodavubugelamuzafozu.pdfIn PDF document text
    • https://cdn.sqhk.co/vagizabibo/jihagfq/garden_wars_2.pdfIn PDF document text
    • https://rafafokisot.weebly.com/uploads/1/3/4/7/134738004/muxumedap_jakapetuxitu_sexexo.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/aggfmXY/first_aid_training_red_cross.pdfIn PDF document text
    • https://xatiletovolut.weebly.com/uploads/1/3/1/4/131409128/4994735.pdfIn PDF document text
    • https://cdn.sqhk.co/bofimekowadu/ijXVjix/9600636052.pdfIn PDF document text
    • https://cdn.sqhk.co/mutuwatu/FFDvhbb/best_photo_editing_software_for_beginners_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kekagate/h8ie4gi/rezoromogiko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_186489feb0d34f7ea67625a07c04a7c6.pdf?index=trueIn PDF document text
    • http://bolirazebaf.myartsonline.com/string_theory_david_foster_wallace_espaol.pdfIn PDF document text
    • http://duxegejuw.atwebpages.com/digejiwedagiboxatibolum.pdfIn PDF document text
    • https://6a421494-2577-4416-904f-e17348f56b63.filesusr.com/ugd/85e76a_c186d0c8bbe24962899426e1dcd88722.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6adfbef-058e-4643-8eac-6accf7ee94ca/the_green_mile_detroit_leafly.pdfIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_7217c1478bc648a786c3430f7ab00d9e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6636015b-536c-49c9-85c8-27161a7fe770/what_year_is_my_polaris_trail_boss_325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97780462-4ba4-4faf-8577-36ee72f30a7d/rivagifiweje.pdfIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/55041396118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/748c038c-f6e3-45a9-841b-5f0589ef121c/96152598940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3a57f90-06e3-4e69-ae42-c8312a0aaa13/element_32_led_tv_reviews.pdfIn PDF document text
    • https://7c2a7e5f-de2f-4207-b822-d971188c697e.filesusr.com/ugd/17f605_ac59bd71c5e04aabbfe4497ac3af0bd0.pdf?index=trueIn PDF document text
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_2c49bc9f04db4e1882234aa930655412.pdf?index=trueIn 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_off0000fdbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBF 5168 bytes
SHA-256: dead71b8fd1d6932e11387e865a818c6facbc0ed3b2c7b6a1f46dbf7edc1781d
font_01_sfnt_off00010f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F53 10232 bytes
SHA-256: 9fa56906a99d8951ffca04fe4af5ced91eef8a07dad7fbc651f898deecbc9b80