Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d7662ed3354531…

MALICIOUS

PDF

90.4 KB Created: 2021-05-18 22:18:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 48b79dde9663bf30f24cf4ae5c536d38 SHA-1: 2a6be94b51f4bac91c6ada3a4a01ee5aa2c07324 SHA-256: d7d7662ed3354531d68c46d3dfcd51baff0541a18c5906ad4e10f5d85c4339c5
126 Risk Score

Malware Insights

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

The PDF document contains a link to 'fokemale.ru' which is flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The document body, though heavily garbled, contains references to 'wkhtmltopdf' and a date, indicating it was likely generated programmatically. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://fokemale.ru/strik?utm_term=gta+san+andreas+nas%25C4%25B1l+indirilir+full PDF link annotation
    • https://mobiduretul.weebly.com/uploads/1/3/4/6/134681609/julizenozeb-xibowogiserabe.pdfIn PDF document text
    • https://naziwimirup.weebly.com/uploads/1/3/4/3/134371197/3878462.pdfIn PDF document text
    • https://munulokepopat.weebly.com/uploads/1/3/5/2/135297381/7189398.pdfIn PDF document text
    • https://xijuxesipokufi.weebly.com/uploads/1/3/4/0/134042605/lajewarufibebaf.pdfIn PDF document text
    • https://dulodegusatoto.weebly.com/uploads/1/3/1/6/131636763/lanodor-rinejixu-tamuka-pafajan.pdfIn PDF document text
    • https://mavulirapiba.weebly.com/uploads/1/3/4/7/134741644/nolifidakazaro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/157fa987-9d03-450e-8ed4-183c4cf2999b/vajoxokebalozixawaniwu.pdfIn PDF document text
    • http://damabop.epizy.com/52100315757.pdfIn PDF document text
    • http://fujalomasetugib.rf.gd/wujivedutiva.pdfIn PDF document text
    • http://gaposajalumawes.rf.gd/chuyen_dang_hinh_sang_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b09777e-a3c2-44d2-89bb-bcaeca5d940e/18244427318.pdfIn PDF document text
    • http://bijesinatepeli.epizy.com/socrates_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57e4eb21-5446-4e2e-866f-cca39286d42a/75733486194.pdfIn PDF document text
    • http://jadaxoletigagin.epizy.com/webulevowasuwafetutufaled.pdfIn PDF document text
    • http://fibotemirazopo.rf.gd/writing_task_2_ielts_with_answers.pdfIn PDF document text
    • http://gojudupawoziwex.epizy.com/riwad.pdfIn PDF document text
    • http://kolitaguligod.epizy.com/analytical_method_development_and_validation.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D02 4964 bytes
SHA-256: 5ce6517de8550780f19f2895332a273dc1e115dd8e257ef83453013b237f1f72
font_01_sfnt_off00011df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF9 12564 bytes
SHA-256: 35b7b86f97a03dc9388c3b445590cc1cdbfee42b8126c3e9a26ee92a546fe129
font_02_sfnt_off000144f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144F9 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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