Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b7ef1ce553c2c5…

MALICIOUS

PDF

69.7 KB Created: 2021-02-18 13:09:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 59337a0888091f277b1933d6296c2346 SHA-1: 850398ba1e915af1f9c57887253d7b939a0d2035 SHA-256: 92b7ef1ce553c2c532eb51252ce25642ef090a8ae35966f71aa4985a2b44eac7
194 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics, suggesting it's part of a network designed to distribute malicious content. The presence of numerous external links, including 'https://jottigo.ru/wix?keyword=vw+touareg+manual+download' and others hosted on disposable domains like weebly.com and sqhk.co, points towards an attempt to redirect users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a delivery mechanism for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=vw+touareg+manual+download PDF link annotation
    • https://cdn.sqhk.co/nelenikarate/hjjjThb/carnival_games_wii_rom.pdfIn PDF document text
    • https://dojoxokixen.weebly.com/uploads/1/3/4/8/134878929/rinupadekube-kipopewen.pdfIn PDF document text
    • https://wovinimupilof.weebly.com/uploads/1/3/1/4/131453577/nodogexapirufusivez.pdfIn PDF document text
    • https://mufudenufasos.weebly.com/uploads/1/3/4/4/134492520/8534676.pdfIn PDF document text
    • https://xaxibilezulaf.weebly.com/uploads/1/3/4/0/134096047/5449155.pdfIn PDF document text
    • https://cdn.sqhk.co/miloniwuwave/wLsgiig/tor_browser_apple_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/mivufarowiwi/BZVibic/cloud_tie_dye_sweatpants_diy.pdfIn PDF document text
    • https://sudopefizumizer.weebly.com/uploads/1/3/1/3/131383323/f63d39ad1.pdfIn PDF document text
    • https://cdn.sqhk.co/kuvapipitol/EUhfghY/dekedenogibibapemovari.pdfIn PDF document text
    • https://sugemisikuwev.weebly.com/uploads/1/3/1/8/131856456/pofusuv_vuxisofifab.pdfIn PDF document text
    • https://lobusuzagoti.weebly.com/uploads/1/3/4/4/134470260/pesejuj.pdfIn PDF document text
    • https://cdn.sqhk.co/fudimesa/Tsib15R/video_downloader_apk_pro.pdfIn PDF document text
    • https://sefariduzaki.weebly.com/uploads/1/3/4/6/134665623/04f3e9a.pdfIn PDF document text
    • https://cdn.sqhk.co/lepowabog/igcEpba/53995067359.pdfIn PDF document text
    • https://peketodofow.weebly.com/uploads/1/3/4/5/134589962/wogasutezimegu.pdfIn PDF document text
    • https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/gonos.pdfIn PDF document text
    • https://ruxevikupasej.weebly.com/uploads/1/3/4/6/134663562/xemapozaluwiri.pdfIn PDF document text
    • https://ginuwedisifixel.weebly.com/uploads/1/3/4/7/134744372/gifumopibag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DC 5024 bytes
SHA-256: 5ab6c4b3bf91dea714ab141ea3a71a5e21678bf86158b57934af17461ce7664d
font_01_sfnt_off0000e4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EE 10624 bytes
SHA-256: f0bce229da7018c7e3176a18e15c7f463824fdbba261aaec8b66c946785d356f