Malicious PDF — malware analysis report

Static analysis result for SHA-256 a204f6e0f3bf7c9a…

MALICIOUS

PDF

82.0 KB Created: 2021-02-15 07:48:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 96d479e5d5d4cd634579139b40a05f26 SHA-1: 15633d611c14fe5da4d813efcb0ce0ff11129fe0 SHA-256: a204f6e0f3bf7c9a20d27c849f90307a9254f85b4ac5e78b2d2e257b230fb8fc
244 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm on disposable hosting. The embedded URLs point to various PDF files hosted on domains like 'menformula.xyz' and 'weebly.com', suggesting a coordinated effort to distribute content or manipulate search engine results. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=chevy+truck+manual+trans In PDF document text
    • http://menformula.xyz/gupopivaj61m2o.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/dajchcR/professional_bridal_makeup_artist_near_me.pdfIn PDF document text
    • https://rawubewo.weebly.com/uploads/1/3/1/4/131405976/bodogoji.pdfIn PDF document text
    • http://prostotit.site/examiner_report_igcse_physicsarumh.pdfIn PDF document text
    • https://donabetolemi.weebly.com/uploads/1/3/1/6/131637402/xexowis.pdfIn PDF document text
    • https://rakafofolobe.weebly.com/uploads/1/3/4/6/134649319/rojevew.pdfIn PDF document text
    • http://mkuu.club/13970814998qbdki.pdfIn PDF document text
    • https://zinaxavum.weebly.com/uploads/1/3/4/3/134354277/bapabokazuvuvi.pdfIn PDF document text
    • https://cdn.sqhk.co/sipobufiw/ibcphi2/7311714707.pdfIn PDF document text
    • https://cdn.sqhk.co/desiruzag/cb0Mqgc/hockey_slang_quiz_sporcle.pdfIn PDF document text
    • https://vubujoxesawuzar.weebly.com/uploads/1/3/4/4/134476738/fakifedanuzewabilo.pdfIn PDF document text
    • https://ripukalogud.weebly.com/uploads/1/3/4/3/134391837/3a5430.pdfIn PDF document text
    • http://infonewstravel.com/english_language_learning_videoyfbm7.pdfIn PDF document text
    • https://cdn.sqhk.co/losokifape/gm4hbja/52344720862.pdfIn PDF document text
    • https://benefirezunaxo.weebly.com/uploads/1/3/4/8/134864331/wegupibugev-jutafawawob-xokut.pdfIn PDF document text
    • http://table-wait.com/vascular_malformation_classificationnips6.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
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A0 5012 bytes
SHA-256: a4f9e5d2edfa1d19477d097217a652a61014069310a80e1936231b0d707b3e97
font_01_sfnt_off0001098a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098A 10264 bytes
SHA-256: d1d67090aae0b1281cc34656151b85baacfdd0454b7c459a9e6ca824fa67b35e
font_02_sfnt_off00012c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C97 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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