Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3960a8a754537d…

MALICIOUS

PDF

106.1 KB Created: 2020-12-03 00:08:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1e0a263533be720e6157be620af34438 SHA-1: 1c15561a3eb67d872be01a83a2c8c0c885956e72 SHA-256: 4e3960a8a754537d1c442089e38cd82208fa93ea554514496286f848ac9916a5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a PDF link farm. One of the primary external URIs, 'https://trafffi.ru/aws?utm_term=genero+binario+pdf', suggests a malicious intent, possibly for SEO manipulation or to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, indicating it's a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/aws?utm_term=genero+binario+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495686/normal_5fad49558136d.pdfIn PDF document text
    • https://fizakisel.weebly.com/uploads/1/3/4/4/134402115/waloz.pdfIn PDF document text
    • https://jagusidenoz.weebly.com/uploads/1/3/4/9/134902343/vorilivok.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/satulibaren/18138370514.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1df43f75b166439dc2dd/1606295029337/2680225830.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/dalusuxinedilozegi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e698cd1e280355d44756/t/5fc4fd58173fb5383b40b97e/1606745433375/sejpme_pre_test_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12a77be9b6939510c7598/t/5fc551212dd96f59189dbafa/1606766885486/2000_kanji_xp_theo_vn.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ed4f1452f90b7fe57e24/t/5fc564d5eaf37e3b6451cbcf/1606771925617/black_mushroom_diablo_3_reddit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52473a3bf4b14abc498e4/t/5fc724343ac9c763f4d187e7/1606886452817/67357344636.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/vativojugepod.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/properties_of_real_numbers_activity.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf53d0173fb5383b991cd8/1606374352528/reremibogexipanunubigiki.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_off00016280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16280 4996 bytes
SHA-256: 592de6fb90bb715bd1caf607ad455a4650940d40905d7fab0c43a5d228d9f607
font_01_sfnt_off00017392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17392 11720 bytes
SHA-256: 0090f91eae41711022f77c62370139704d6f01c20b7562150c5c68b1fa97fb7d

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