Malicious PDF — malware analysis report

Static analysis result for SHA-256 70da89d9a195bb2a…

MALICIOUS

PDF

70.7 KB Created: 2021-03-07 08:40:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d56fc5e8e0a6e6d6037ea320cac1975f SHA-1: b55e7fc07833316006d9287073cb0e44a8294ded SHA-256: 70da89d9a195bb2a85310e3a0d0af4e50192b1245c1aa16d7ef9781b7e796411
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of an SEO link farm designed to redirect users to malicious sites. The primary malicious URL identified is fokemale.ru, which is likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=boss+tuner+and+metronome+tu-80+how+to+use PDF link annotation
    • http://zegererevez.medianewsonline.com/2013_dodge_avenger_serpentine_belt_diagram.pdfIn PDF document text
    • http://fekosuse.getenjoyment.net/what_is_the_cost_of_postage_stamps_in_uk.pdfIn PDF document text
    • http://lizowaw.scienceontheweb.net/23295407097.pdfIn PDF document text
    • http://raxawevamavox.getenjoyment.net/percy_jackson_character_traits_in_sea_of_monsters.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/saxosivozup.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/5497468374.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/canon_pixma_mg5320_wireless_inkjet_photo_all-in-one_printer.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/zomuzigo/mejosenugudadisilejokuko.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/80784004632.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/when_god_comes_down_to_earth.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/baxineti.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/zmodo_camera_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/bodyworx_treadmill_jx300_manual.pdfIn PDF document text
    • http://siwemoxoxawevuv.atwebpages.com/45957702810.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/free_project_roadmap_ppt_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/miloxo.pdfIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_7d349a0e2b0e4728a7b4f6f39ac31aa5.pdf?index=trueIn PDF document text
    • https://d046670e-94b8-4ea2-8efc-69fca9b502c9.filesusr.com/ugd/c0b427_b973350dee0f45c5929a50c2930359da.pdf?index=trueIn PDF document text
    • https://5ccda086-29c7-4024-8a93-689df1f3b89c.filesusr.com/ugd/ed8107_5e6a25dd6a2440bc8bd59a1301d0e205.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/29625827073.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/victory_energy_services_llc.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_off0000d67b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67B 5544 bytes
SHA-256: 8ed508a7b50f2cc121af50a1a16007243ad01155a23eb02c4093a3adf2a8094a
font_01_sfnt_off0000e93d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93D 10588 bytes
SHA-256: 62055cb59ada229b8c96626c788ea2a873db04536dd420fbed15c395e42e675b

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