Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b433e7c0c251880…

MALICIOUS

PDF

96.5 KB Created: 2021-02-03 17:48:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4cb524289bbc3ddde7af49bd0eb8ea33 SHA-1: 2e6b7de59e4243cc8dd6f7392698484478e6da85 SHA-256: 7b433e7c0c25188069ae1ea83a34284a8f532f4f815e853ae1fb411d0420696c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF document exhibits characteristics of a phishing lure, indicated by the 'SE_MFA_LURE' heuristic and the presence of numerous external links, many of which point to potentially malicious domains. The document's content, though heavily obfuscated, appears to be related to 'Yowhatsapp 2018 latest', suggesting a social engineering pretext. The numerous external links, including those hosted on weebly.com and a direct link to a PDF on maypoin.ru, are likely intended to redirect users to credential harvesting pages or download further malicious content.

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://maypoin.ru/wb?keyword=yowhatsapp%20%202018%20latest PDF link annotation
    • https://nopubogap.weebly.com/uploads/1/3/4/6/134667077/b52fdea4366.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/95658adffba3.pdfIn PDF document text
    • https://mulibini.weebly.com/uploads/1/3/4/8/134881685/1b4dd33ba6c97f.pdfIn PDF document text
    • https://sanorasawuvut.weebly.com/uploads/1/3/0/7/130738762/9255e.pdfIn PDF document text
    • https://panikelixiguju.weebly.com/uploads/1/3/4/4/134478359/rujebubiru.pdfIn PDF document text
    • http://hookup673.site/26024438614cz1io.pdfIn PDF document text
    • https://jifosibupegexuv.weebly.com/uploads/1/3/4/6/134692258/rejafen-vegenuvo-fuwedovufexa.pdfIn PDF document text
    • https://gejekawuxo.weebly.com/uploads/1/3/4/4/134497426/82bc39f172.pdfIn PDF document text
    • https://muvekova.weebly.com/uploads/1/3/5/3/135394778/nipujajizoj_mikaledid.pdfIn PDF document text
    • https://wuvotawek.weebly.com/uploads/1/3/4/8/134872633/rogufobaxasibus_wexij_telizo_nugupo.pdfIn PDF document text
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/da97745f.pdfIn PDF document text
    • https://viwoseloza.weebly.com/uploads/1/3/4/8/134861971/libar-ruxil-gekedelafu-nozije.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/gomaxod/canada_food_guide_old.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/wow_farming_mounts_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/basic_tenets_of_christianity.pdfIn PDF document text
    • http://lojupodinitaxug.epizy.com/cv_template_word_school_leaver.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/grep_guide.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_off00011d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1A 5384 bytes
SHA-256: 5e356c6352fcd371c992e87e298f410a5b0e273cf110825314178d30e647a401
font_01_sfnt_off00012f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F78 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00013806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13806 10924 bytes
SHA-256: 89ed6892ef2087b5ab52d291c695947f5ff007e98c9ecb1790aa2b609f65a78f
font_03_sfnt_off00015d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D89 16468 bytes
SHA-256: 4063ec59e679098d3e2fc33ed150d3c107b483b90cf0c08268612d9aff2b62af

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