Malicious PDF — malware analysis report

Static analysis result for SHA-256 91a682614dcd92e2…

MALICIOUS

PDF

93.4 KB Created: 2021-03-06 17:20:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4dce1950beed1f97053830344db5a663 SHA-1: 9f4aa794186d788be07d23025531407264a21b91 SHA-256: 91a682614dcd92e21e32797470a4cd04964b6946b1d8d26e9e0a12a05885a4c1
156 Risk Score

Malware Insights

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

The sample was identified as malicious by multiple heuristics, including ClamAV and an ML classifier, and contains a large number of external links. The PDF document body, though heavily obfuscated, suggests a lure related to 'Devocion de los 33 dias pdf'. The presence of numerous external URLs, including one pointing to 'ponafet.ru', indicates a likely attempt to redirect users to malicious sites for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/wix?keyword=devocion+de+los+33+dias+pdf
    • https://xodukibefapox.weebly.com/uploads/1/3/0/8/130873769/1633525.pdf
    • https://dejegudiferu.weebly.com/uploads/1/3/1/8/131857494/7138489.pdf
    • https://guwawafike.weebly.com/uploads/1/3/5/3/135338161/jaginudinozal.pdf
    • https://xinomufe.weebly.com/uploads/1/3/4/7/134706409/kobigerinevebalamub.pdf
    • https://zukevijidogokil.weebly.com/uploads/1/3/0/7/130738647/lizifu-pakikavodez-firowilojela.pdf
    • https://static.s123-cdn-static.com/uploads/4403960/normal_5ff9e0b26f52a.pdf
    • https://tedalemom.weebly.com/uploads/1/3/5/3/135398197/b6037356a8f1.pdf
    • https://guvorike.weebly.com/uploads/1/3/4/2/134266232/jijoxuko.pdf
    • https://static.s123-cdn-static.com/uploads/4471723/normal_5fff0c745a222.pdf
    • https://nuxabofubuwaxef.weebly.com/uploads/1/3/2/7/132740905/2768b6e2.pdf
    • https://lonawapusar.weebly.com/uploads/1/3/0/7/130776864/dunomakadojuzozuvazu.pdf
    • http://vofidiporalives.22web.org/what_the_bible_said_about_divorce.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://riluromeni.epizy.com/zuzetorikolugakesafetud.pdf
    • https://5ccda086-29c7-4024-8a93-689df1f3b89c.filesusr.com/ugd/ed8107_51ac0786bac04d04ba64ecdc908174ea.pdf?index=true
    • https://s3.amazonaws.com/jolunenafobuw/heenan_lake_fishing_report_2019.pdf
    • http://wasaxotudulolo.epizy.com/tizokofiwofagikirev.pdf
    • https://s3.amazonaws.com/wovigebi/buzivimujivulusonijekos.pdf
    • https://s3.amazonaws.com/paxunu/80159092247.pdf
    • http://dejedizanabi.epizy.com/34552974799.pdf
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_de96880268a343fda284d3adec3fbf95.pdf?index=true
    • http://tupanukaxigazit.epizy.com/texas_sheet_cake_with_cherry_pie_filling.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d52.bin
6e71d199ce5705f6156102cff6668ecbfdbc99e0459e4162ef798c90ef84c766		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D52 5276 bytes
font_01_sfnt_off00013f6b.bin
2acab3bd5050a25b859fb9cfbd511be71f2babc2cc542b575b5005ce98843657		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F6B 12420 bytes

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