Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e936bd407d27853…

MALICIOUS

PDF

73.5 KB Created: 2021-02-22 15:44:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7df97aa2e8b0bc8a2a2d9d2954c0d2d5 SHA-1: c476250e002fb88d2b4a9ab835b1fdfe6b7e551b SHA-256: 6e936bd407d278532df118777e71cc1ada54542284d6fdc1810cc8d1b9d20a9e
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/wix?keyword=conjugarte+worksheet+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4380528/normal_5fed2b3837c82.pdfIn PDF document text
    • https://matexofetuboso.weebly.com/uploads/1/3/1/4/131453592/vafozilemag_rixanogevuto.pdfIn PDF document text
    • https://dowusezawidi.weebly.com/uploads/1/3/3/9/133997386/ledafutepatap.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxoporerom/cgg37an/farkle_dice_game_free_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/ijiichb/abcmouse_mastering_the_alphabet.pdfIn PDF document text
    • https://cdn.sqhk.co/radojiga/JghIZQo/harvest_church_riverside_live.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504870/normal_602fdd2981207.pdfIn PDF document text
    • https://pasuwuzo.weebly.com/uploads/1/3/1/4/131438486/fiwokewovefof.pdfIn PDF document text
    • https://limofagis.weebly.com/uploads/1/3/4/6/134640762/doregevefemoxi.pdfIn PDF document text
    • https://nunesevafarub.weebly.com/uploads/1/3/0/8/130874378/e59d3700ac2.pdfIn PDF document text
    • https://fagojature.weebly.com/uploads/1/3/3/9/133987822/kefogutevef.pdfIn PDF document text
    • https://musegozaxugovu.weebly.com/uploads/1/3/0/8/130873783/lumikifa_mofepegobisa_votirozuke_tufojifun.pdfIn PDF document text
    • https://bimidupixujeg.weebly.com/uploads/1/3/4/3/134319160/9063697.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/n1sjfHt/happy_wheels_24_unblocked.pdfIn PDF document text
    • https://lufosafol.weebly.com/uploads/1/3/0/7/130775677/xawajes-mamumidavudo.pdfIn PDF document text
    • https://zoxiniguve.weebly.com/uploads/1/3/4/5/134584112/marulugix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465396/normal_600ed07870835.pdfIn PDF document text
    • https://zazanopub.weebly.com/uploads/1/3/2/7/132712119/98c138cffbd28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xexelakufakeze.epizy.com/fema_ics_100_exam_answers.pdfIn PDF document text
    • http://dovagoxaluzof.rf.gd/address_labels_from_google_sheets.pdfIn PDF document text
    • http://lomuripejo.epizy.com/calculating_percentages_without_a_calculator_worksheet.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_off0000e45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45F 5052 bytes
SHA-256: c7b52b8a66bd7dfb13932baaeeb9db8dd9af188782d0585d5a3150583843e952
font_01_sfnt_off0000f59f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59F 10256 bytes
SHA-256: 4c33bcacbf26e66286ef0a84ef3234a4f088f3c387c726a1357af3eb65b5c264