Malicious PDF — malware analysis report

Static analysis result for SHA-256 07dc84f7e3bb195a…

MALICIOUS

PDF

87.9 KB Created: 2021-05-28 08:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f125f56c39e834f761b4bb46db319176 SHA-1: 2baca0ce708301b3198e11898422c834106ab04c SHA-256: 07dc84f7e3bb195a327c43e9c549885d9b55f1b968309e4620538634843f0856
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 contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm to distribute further payloads or phish users. The presence of a URL with a 'utm_term' parameter pointing to 'fast+tap+auto+clicker+pro+apk' suggests a lure for potentially unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/strik?utm_term=fast+tap+auto+clicker+pro+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413465/normal_60346f8cae30e.pdfIn PDF document text
    • https://niduzipotobumam.weebly.com/uploads/1/3/6/0/136054567/3323786.pdfIn PDF document text
    • https://rugibabolunape.weebly.com/uploads/1/3/1/4/131454120/0d0e65a7d5.pdfIn PDF document text
    • https://tofeligekejogen.weebly.com/uploads/1/3/4/8/134873344/8642748.pdfIn PDF document text
    • https://jitavemalidev.weebly.com/uploads/1/3/1/8/131871699/kubuniv.pdfIn PDF document text
    • https://lefagetali.weebly.com/uploads/1/3/2/3/132302894/59e5c5dc6e2524.pdfIn PDF document text
    • https://dekoreriso.weebly.com/uploads/1/3/7/5/137501726/kerufejod_damamobusagiwa.pdfIn PDF document text
    • https://gilanevevo.weebly.com/uploads/1/3/0/7/130739192/kozis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378628/normal_5fd15a9922420.pdfIn PDF document text
    • https://faneboluti.weebly.com/uploads/1/3/4/4/134464249/wofutujoxaxa.pdfIn PDF document text
    • https://lerorenoj.weebly.com/uploads/1/3/5/3/135390996/ripepep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413004/normal_5fe6eaf342b5d.pdfIn PDF document text
    • https://rebopugosoge.weebly.com/uploads/1/3/5/3/135346619/sifapex.pdfIn PDF document text
    • https://dofenerezi.weebly.com/uploads/1/3/4/4/134446603/8639683.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/eff07468-3718-4a07-8f1e-1fdd22d2ce6f/71517490964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e28c0d5d-1ea4-4342-8db1-d2dbe5360bb0/how_effective_is_the_13_day_metabolism_diet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b09302cd-6afc-4ca1-9f7c-39280802fd67/jixedelidiroxodemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04502164-65b8-4e4e-87e5-d866399f8cf2/war_of_the_worlds_2_the_next_wave_download.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B6 4720 bytes
SHA-256: 31f1291875c4cb0dd78e19da5775df48d1987eb3a1b3929ed1f26dac2fca9dde
font_01_sfnt_off000107da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DA 11508 bytes
SHA-256: abaa0baee666857e3fb9356692798fa4206e0ec6f5d459fc45010166978a7a05
font_02_sfnt_off00012f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F1E 16096 bytes
SHA-256: 88378ffc602f0acbfd9587c7fa3e93a1544965473cb65d93b475df506c0c0795
font_03_sfnt_off000143eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143EB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378