Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b0649e91ba20126…

MALICIOUS

PDF

74.8 KB Created: 2021-01-19 20:53:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c0efbb8e0a827c7b571774ddcc3cd938 SHA-1: 88c0c1b4b9e568d8231ab1c7018aa6e48630391c SHA-256: 1b0649e91ba201269b6d525371b23bb9d2984afca883ec7fbef5830236c81940
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, indicating a potential link farm or redirection scheme. The ML classifier also strongly indicated maliciousness. The document body text is heavily obfuscated and unreadable, but the presence of external links and the heuristic firings suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://traffine.ru/123?utm_term=cooks+essential+air+fryer+accessories PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408335/normal_60046e3f83908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408336/normal_5fa3c4dacabd0.pdfIn PDF document text
    • https://bonopabugo.weebly.com/uploads/1/3/4/5/134581776/8072627.pdfIn PDF document text
    • https://jizimixu.weebly.com/uploads/1/3/4/0/134095846/970212.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452382/normal_5fa4d76521e70.pdfIn PDF document text
    • https://site-1168267.mozfiles.com/files/1168267/bbc_news_report_intro.pdfIn PDF document text
    • https://ludopugadataz.weebly.com/uploads/1/3/4/7/134709803/7f429.pdfIn PDF document text
    • https://site-1166732.mozfiles.com/files/1166732/62289981867.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413012/normal_5f95c75a0a6cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481270/normal_5fcafe46b49c2.pdfIn PDF document text
    • https://gumebasa.weebly.com/uploads/1/3/4/5/134509515/dazamibesenixiwosivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500878/normal_5fb6ab900a232.pdfIn PDF document text
    • https://dasujodiket.weebly.com/uploads/1/3/4/4/134481559/6875544.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/somamere/chain_of_distribution.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/android_9_lg_v30_plus.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/90730563851.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/dragon_city_breeding_guide_friendship_dragon.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_off0000e6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EA 4944 bytes
SHA-256: 3ec5c63c30da09ef4d9dadfff9df1e9dc3ef4a05eb37e826d7a7bba1bbac27d5
font_01_sfnt_off0000f7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D6 11348 bytes
SHA-256: 3126bcf102b6cfc69009bf0e4a6c091b6fa0d57971a1ef8b1c8fc38e915cfd94

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