Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe4d5b56ba88bece…

MALICIOUS

PDF

80.8 KB Created: 2021-05-05 11:35:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7d6163ec1b06916ccfc6ca635f6e33a1 SHA-1: 551f585ca3736084d11e2cd22cb70f0076456d1a SHA-256: fe4d5b56ba88bece60ebb6c12ba750a5c32c0327a40cb38a19b775c211a8df83
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, one of which is `https://fokemale.ru/strik?utm_term=2006+honda+civic+hybrid+service+manual`. The presence of many disposable domains and link farm characteristics suggests a phishing or malware distribution scheme. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://fokemale.ru/strik?utm_term=2006+honda+civic+hybrid+service+manual PDF link annotation
    • http://dezimazokuxulil.mygamesonline.org/43796508698.pdfIn PDF document text
    • http://jesibijifinuz.mywebcommunity.org/nurani_al_quran_free_download.pdfIn PDF document text
    • http://dajobod.getenjoyment.net/52300701551.pdfIn PDF document text
    • http://jamotovoxut.mywebcommunity.org/ttulos_de_crdito_direito_empresarial.pdfIn PDF document text
    • http://fosireditoj.mygamesonline.org/how_to_care_for_gerbera_daisy_plants.pdfIn PDF document text
    • https://lunafegosewexik.weebly.com/uploads/1/3/5/3/135351611/9193485.pdfIn PDF document text
    • http://gufurebu.medianewsonline.com/xudutovolasu.pdfIn PDF document text
    • http://bakavorun.getenjoyment.net/ksa_tourist_visa_handbook.pdfIn PDF document text
    • https://rewegabelera.weebly.com/uploads/1/3/5/3/135390500/xaxekomasagetaveva.pdfIn PDF document text
    • http://zotikarida.medianewsonline.com/aneurisma_scielo.pdfIn PDF document text
    • https://dapazigozasonim.weebly.com/uploads/1/3/4/4/134466252/d5655aac69a.pdfIn PDF document text
    • http://xenejesujotolud.mypressonline.com/perbedaan_luka_antemortem_dan_postmortem.pdfIn PDF document text
    • http://vurejowug.mypressonline.com/nubub.pdfIn PDF document text
    • http://zakosemej.mypressonline.com/voxuxokugofidinupevi.pdfIn PDF document text
    • http://vigikigopaloze.medianewsonline.com/xapanekasalapimavaxu.pdfIn PDF document text
    • http://bukupiduge.mypressonline.com/factor_groups_abstract_algebra.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/9ec7f840-9e00-4c79-92d6-42eb8793a8a8/40054235230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94dcd983-b3ac-4922-a534-827f1b19774a/43511499672.pdfIn PDF document text
    • http://majezomisi.myartsonline.com/xutobevinop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3471fb0-5b32-4c21-a056-5667bbd0f176/mitivukidem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2bb1c3e-e333-4e77-8b5d-d7705b2aea7d/50368279156.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70a0bd8e-ee0f-46d5-8a3c-89fcd0b73a9f/37600555342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4dc17a5-98ee-4605-bfe8-91d304a81469/yamaha_rx-v473_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40173aab-7922-4ea2-875d-787085cc2c84/what_are_human_trials.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e851442-82e1-4314-b634-8a9d385ff57b/british_red_cross_first_aid_training_app.pdfIn PDF document text
    • http://xasagode.myartsonline.com/what_is_cos_tan_sin.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_off0000fc0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0B 5812 bytes
SHA-256: 2d5baeb266fcba9a3f35dd7b45d08ee0eba81bb2280e52ac345f45046d4fb7ee
font_01_sfnt_off00010fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAC 11088 bytes
SHA-256: f3c714d9ac8f9cfc7fa53e9d540a8ad3c458290827a42c030ffa50bd0a2810be