Malicious PDF — malware analysis report

Static analysis result for SHA-256 692a6417901891a6…

MALICIOUS

PDF

73.0 KB Created: 2021-03-20 21:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1343f0c44f2dcac41efcefcfbe80a21c SHA-1: d7de8329121c69adceac1fdec43a3860f9006ca6 SHA-256: 692a6417901891a6148e7ab7e7de2d617ef6294445d58ac247cef4389b494c60
136 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a phishing lure, using a seemingly benign document title to entice users. The presence of multiple external URIs, including one identified as an SEO redirector for free-download phishing, strongly suggests malicious intent. The ML classifier and ClamAV detection further corroborate this assessment, indicating the file is likely a trojan designed for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/wix?keyword=cellular+transport+and+the+cell+cycle+worksheet+answer+key PDF link annotation
    • https://lumewogomor.weebly.com/uploads/1/3/4/3/134319436/6cb111f5fe9.pdfIn PDF document text
    • http://dokakepitizix.medianewsonline.com/what_is_the_catholic_definition_of_marriage.pdfIn PDF document text
    • https://gosopitodemeku.weebly.com/uploads/1/3/4/8/134874694/zexebametizadukusen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392860/normal_602fd98649a0b.pdfIn PDF document text
    • https://guxofoxevi.weebly.com/uploads/1/3/4/7/134737998/1403388.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486351/normal_5fd0eb1467c1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505820/normal_601faf59936eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392861/normal_5fed96739026c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376878/normal_603c23fbe91f0.pdfIn PDF document text
    • http://rezisekuvaz.mypressonline.com/bel_ami_maupassant_gratuit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419642/normal_5fc7994a505ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404113/normal_5fec4ff100ffa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371788/normal_5fee359646ea6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385862/normal_6002a2787511d.pdfIn PDF document text
    • https://xufipenisugiw.weebly.com/uploads/1/3/0/8/130873979/2310978.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480579/normal_604ae6b5a8f1e.pdfIn PDF document text
    • https://jewelilug.weebly.com/uploads/1/3/4/3/134331877/jexokiw_vobovedewug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405202/normal_5ff03b21b612a.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/gagagakigibapo/ielts_speaking_sample_answers_introduction.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/59731818217.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/dugogefixunuxok.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/undertale_ruins_theme_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/history_of_liquid_propellant_rocket_engines.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17A 5324 bytes
SHA-256: 989c870d98b378b6b8462312befc6e9e11bced1c601a959a9f544bf27a4c0297
font_01_sfnt_off0000f3a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A4 10204 bytes
SHA-256: bc2588a42cf29322e90d8944c823e73f4a54c060dd7fe29e6b67252255d7394b