Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fb5f67ea2e90a88…

MALICIOUS

PDF

75.0 KB Created: 2021-02-16 09:25:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: df2dd118252faedb6ac6d5fe73797e40 SHA-1: 0dead538ab4b84744a0be6f30894a148dbc5cd91 SHA-256: 0fb5f67ea2e90a8803251f5848cadca67a999494a558225613e85332d89df1ca
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document exhibits characteristics of a phishing lure, as indicated by the 'SE_BRAND_CREDENTIAL_PHISH' heuristic and the presence of numerous external links. The document impersonates brands like Instagram and uses deceptive content, such as 'Garmin nuvi 1390 map update 2019', to entice users to click on malicious links. The ML classifier and ClamAV detection further support its malicious nature, suggesting it's designed to lead users to credential harvesting pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://jeletaru.weebly.com/uploads/1/3/5/3/135321400/ronowivumu.pdf.
  • 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://jottigo.ru/strik?utm_term=garmin+nuvi+1390+map+update+2019 PDF link annotation
    • https://cdn.sqhk.co/lufelumad/njcgflA/bubble_shooter_rescue_2_mod_apk.pdfIn PDF document text
    • https://jeletaru.weebly.com/uploads/1/3/5/3/135321400/ronowivumu.pdfIn PDF document text
    • https://tukobigerokigab.weebly.com/uploads/1/3/4/6/134653943/siviruja.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/hb3jZtg/abcmouse._com_contact_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/lalivaga/hbgdabV/gif_to_video_instagram_online.pdfIn PDF document text
    • https://sefedajexoxoj.weebly.com/uploads/1/3/4/4/134479396/wapevovirebe.pdfIn PDF document text
    • https://zolefixu.weebly.com/uploads/1/3/4/4/134432518/cbab3ad3b6.pdfIn PDF document text
    • https://bamukafigozoxin.weebly.com/uploads/1/3/4/8/134861202/mosijuvazuvuneda.pdfIn PDF document text
    • https://dojobojijiwum.weebly.com/uploads/1/3/2/6/132681334/391fb297c.pdfIn PDF document text
    • https://cdn.sqhk.co/miranilu/YGMZicc/89735038289.pdfIn PDF document text
    • https://wokopapun.weebly.com/uploads/1/3/5/3/135388848/6b526fe0.pdfIn PDF document text
    • https://funogefoxareso.weebly.com/uploads/1/3/4/0/134041001/xumox-nixirubirodasog-zegejiputexex-neverepelut.pdfIn PDF document text
    • https://retowukiri.weebly.com/uploads/1/3/4/5/134592720/d1ecea94a254b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://putojoner.rf.gd/advocate_personality.pdfIn PDF document text
    • http://maretazijedoval.epizy.com/bajasubigonojokij.pdfIn PDF document text
    • http://tikolikenugim.epizy.com/detifimixevupajisoxano.pdfIn PDF document text
    • http://lakiver.epizy.com/ergothrapeute_formation_adulte.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_off0000e7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C2 5632 bytes
SHA-256: e779cea9be075dcc9bc4903954969839be2e334e44efef7f9076802e56a3d7ec
font_01_sfnt_off0000fade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADE 10536 bytes
SHA-256: 877895904a94ab721a5601a4acf04f582c44348b17ace350673002894512e5e2