Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ec366c0110ffff…

MALICIOUS

PDF

74.3 KB Created: 2020-11-24 06:47:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7695c715a558ca6b819eb9e20cb3e515 SHA-1: b865407389909de54d72ddc11b203a174a1b66aa SHA-256: 92ec366c0110fffff275b284a67773f91ab2781acf1a25dc93361eaf83ea2c5e
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, indicated by the 'SE_INVOICE_LURE' heuristic and the presence of numerous external links, including one to 'trafffi.ru'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to download a second-stage payload or redirect to a phishing site. No scripts were extracted, but the document's structure and embedded URIs point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/123?utm_term=computer+accounting+with+quickbooks+pdf PDF link annotation
    • https://mutazodot.weebly.com/uploads/1/3/0/8/130874237/fd13efb1dcb.pdfIn PDF document text
    • https://bipixexomalexu.weebly.com/uploads/1/3/4/3/134349320/lapesefedi.pdfIn PDF document text
    • https://suwanozafedo.weebly.com/uploads/1/3/4/5/134587456/7521385.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/3868671.pdfIn PDF document text
    • https://ludodufapagita.weebly.com/uploads/1/3/4/6/134616483/57f1ea.pdfIn PDF document text
    • https://kanexala.weebly.com/uploads/1/3/4/3/134374151/difesizes.pdfIn PDF document text
    • https://damokilusul.weebly.com/uploads/1/3/4/4/134463963/badexope.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/wazagidonux/fepufajinoledanigej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be26144f-a991-466b-9b82-710fb7e7d450/jodumegiraveruxut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/857539d5-5649-4c11-8395-4ea1b043d52c/61951752450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e19205aa-7dcc-4754-807d-469663854497/vakegu.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/wagavorakepubofikulikuz.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/hp_15-f272wm_bios_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/mazugezijap/jerunipepipimedobozobozi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc52061a-682d-4ac5-988e-20850b1fb20c/13881745412.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/faceniff_unlocked_apk_2.4.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_off0000e4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4ED 5864 bytes
SHA-256: aa7c061173500a8fc8fc59c48c233844c5b2ffa89030134f9c463013fcbc42b2
font_01_sfnt_off0000f8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B8 10392 bytes
SHA-256: f142013aa4da63284f648c52511ef81495e379427e9e148003982161b32b9cf0

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