Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf06da7cc692ac4…

MALICIOUS

PDF

86.3 KB Created: 2021-02-15 09:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 8863dd9e0598425056c0e51e4c5c849e SHA-1: 99eae6c0d9da462f592a7e98ca171f7e57f1d677 SHA-256: abf06da7cc692ac4adce10e6182bcd05599b27f4599e483becca5ff15687d825
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, indicating it functions as a link farm. Several heuristics confirm the malicious nature, including links to known malicious redirectors and a general PDF SEO link farm detection. The ClamAV detection and ML classifier further support its malicious classification. While no scripts were explicitly extracted, the nature of the PDF and its embedded links suggest it is designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://yafferge.ru/strik?utm_term=dayz+standalone+base+building+plus+guide In PDF document text
    • http://xeeewq.xyz/texte__copier_ce2or7at.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/sijesiretonobif.pdfIn PDF document text
    • http://lafovawolifi.22web.org/civ_5_civs_guide.pdfIn PDF document text
    • http://fortuneo-enligne.com/normal_abdominal_ultrasound_report04j1y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403679/normal_5ffcd97b0854e.pdfIn PDF document text
    • https://takupomowemeb.weebly.com/uploads/1/3/5/3/135314116/d5e127dd96deb.pdfIn PDF document text
    • http://kartaidatodemeleri.com/gegugijirezigag2boqs.pdfIn PDF document text
    • https://viwutexotopuj.weebly.com/uploads/1/3/4/5/134522905/1223717.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/2d_animation_programs_android.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/78577130189.pdfIn PDF document text
    • http://jaxarafepemu.epizy.com/gimutafu.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/40706881039.pdfIn PDF document text
    • http://fofuxolisemaxim.epizy.com/38093654003.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/lafujesididowu.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/liwukoze.pdfIn PDF document text
    • http://pifetageror.epizy.com/werev.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_off0000eae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE6 3948 bytes
SHA-256: 6f2787b3fcc10e098946b6b01f3ebe733326cbdd46305229bf3fed5fbdb9bf1e
font_01_sfnt_off0000f8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D0 5320 bytes
SHA-256: 1e5e7b549973077af884664fa3054695f55be76712669052b05530693ce6b125
font_02_sfnt_off00010b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0E 13352 bytes
SHA-256: 0e1cd16ab88816353a2b1f7149d976849ae3678de2bac05a30980394d2b15298
font_03_sfnt_off00013527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13527 16348 bytes
SHA-256: 44344d777475bc27302cf71c6ce9e96b5edcb3cf6b8673c7cacff1863add0d01

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