Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c47e5877bda320…

MALICIOUS

PDF

103.9 KB Created: 2021-05-31 06:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83fd6918768402108b5e6156ad375b2c SHA-1: 753cf5fa1e47cd8ea8fff92396db5166a661c16a SHA-256: d3c47e5877bda320e3523aa5872badde21c86dc9417106fb516a8d140cd93c63
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link-farming attack. The document contains a large number of external links, many of which are likely intended to redirect users to malicious websites. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to exploit users through deceptive content, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/strik?utm_term=bharti+airtel+annual+report+2018-19+pdf
    • https://static.s123-cdn-static.com/uploads/4413125/normal_5fc7efe58a744.pdf
    • https://static.s123-cdn-static.com/uploads/4406229/normal_5fcb142185410.pdf
    • https://gozaxuvo.weebly.com/uploads/1/3/4/6/134612917/domezodifotof.pdf
    • https://wadidomewagu.weebly.com/uploads/1/3/2/6/132681938/ca805eac.pdf
    • https://daliroxemonove.weebly.com/uploads/1/3/0/7/130775241/xerumikatemavaj_fixurakanov_famepej.pdf
    • https://toxoxazagole.weebly.com/uploads/1/3/0/9/130969938/1792940.pdf
    • https://gikotibosad.weebly.com/uploads/1/3/4/3/134332820/ce0701184ac41ab.pdf
    • https://wirujofijiv.weebly.com/uploads/1/3/4/5/134592393/kopoxewi.pdf
    • https://rogetaguw.weebly.com/uploads/1/3/1/4/131407632/8752c.pdf
    • https://cdn-cms.f-static.net/uploads/4417817/normal_6053eaf06db33.pdf
    • https://genolawibiwiz.weebly.com/uploads/1/3/4/3/134316454/2815904.pdf
    • https://devogenigibef.weebly.com/uploads/1/3/4/5/134501446/garuzabi-lepugediz-dibojabula.pdf
    • https://static.s123-cdn-static.com/uploads/4477864/normal_5fc8d333851e3.pdf
    • https://static.s123-cdn-static.com/uploads/4365635/normal_5fc9eb47aa138.pdf
    • https://cdn-cms.f-static.net/uploads/4464313/normal_60464cd3e8bb5.pdf
    • https://cdn-cms.f-static.net/uploads/4410988/normal_6036989a94848.pdf
    • https://cdn-cms.f-static.net/uploads/4480170/normal_6011ad90ce2cc.pdf
    • https://cdn-cms.f-static.net/uploads/4451555/normal_6034caa8de6ac.pdf
    • https://xapugugividus.weebly.com/uploads/1/3/5/2/135298581/7314746.pdf
    • https://cdn-cms.f-static.net/uploads/4366027/normal_60583bb4ecaa5.pdf
    • https://cdn-cms.f-static.net/uploads/4453103/normal_600cc1c58e392.pdf
    • https://cdn-cms.f-static.net/uploads/4386361/normal_604cec09a9edf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off000156ea.bin
a0165f11d9798ee0cb10ec1b6e72eb39a0a7543dae7cea1646aaeb9c1b7ef881		 pdf-font-stream PDF embedded font (sfnt) at offset 0x156EA 5708 bytes
font_01_sfnt_off00016a5b.bin
7a16284879a1aede1dfd47a6f9fe8e2f4cd1c9b7388017d6e38c17e0464ea2f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16A5B 11212 bytes

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