Malicious PDF — malware analysis report

Static analysis result for SHA-256 a981fe893ca04846…

MALICIOUS

PDF

76.7 KB Created: 2021-02-21 15:19:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: dea1597ee3cf1e769bd1f21fad949d87 SHA-1: 43d5f52cd4e34bd85c6cd32d90e8a852d1e5e3bb SHA-256: a981fe893ca04846fca0de89dcd95e2c3ba655157ab9a2b5eb26d1193ac6b0fd
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm or designed to redirect users to malicious sites. The primary URL observed is https://druttle.ru/123?utm_term=turbochef+pizza+oven+recipes, which is likely used to distribute further malware or phishing content.

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://druttle.ru/123?utm_term=turbochef+pizza+oven+recipes PDF link annotation
    • https://totijavefukaja.weebly.com/uploads/1/3/4/7/134705726/gojodegaja-vawakezudaj.pdfIn PDF document text
    • https://kexulisil.weebly.com/uploads/1/3/4/7/134762119/df069476f.pdfIn PDF document text
    • https://cdn.sqhk.co/sugefixa/ghiiLZ3/bike_race_in_france.pdfIn PDF document text
    • https://xonarupitowij.weebly.com/uploads/1/3/4/6/134617661/5c7d1d88.pdfIn PDF document text
    • https://lewagezu.weebly.com/uploads/1/3/4/3/134369469/89408441.pdfIn PDF document text
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/90d1a3f646e9727.pdfIn PDF document text
    • https://womevelem.weebly.com/uploads/1/3/2/8/132814223/jopabap.pdfIn PDF document text
    • http://islta.fun/644611885613irbl.pdfIn PDF document text
    • https://wexipemeb.weebly.com/uploads/1/3/4/8/134860193/faxudiv.pdfIn PDF document text
    • https://tupisefam.weebly.com/uploads/1/3/1/3/131383837/7ae0c493976ab4b.pdfIn PDF document text
    • https://nuxutesinof.weebly.com/uploads/1/3/1/4/131437012/rusewe_solasorak_siziwavuf.pdfIn PDF document text
    • https://pipabujul.weebly.com/uploads/1/3/2/6/132680817/tudosudesuvalod.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/suxuzubojut/51036754485.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/simafavite.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/49084328846.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/lightning_for_outlook_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/aspectjweaver._jar_1._7.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_off0000eb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5F 5272 bytes
SHA-256: eab52aa47e9e152163cd62dc9201c01c622157e25785f9d59d63aa861aa2c6df
font_01_sfnt_off0000fd53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD53 11836 bytes
SHA-256: 827abb58fa959c35baed8c9a57e826e4e287ff40310676fd66f86f33d6b75d16

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