Malicious PDF — malware analysis report

Static analysis result for SHA-256 487210514352e995…

MALICIOUS

PDF

73.2 KB Created: 2021-01-18 18:51:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2455faeaef32f2a21b17fe223f0f2b29 SHA-1: 90b821d83d3ab5614a31c4bce027753cd96a8a46 SHA-256: 487210514352e995009278067f1794911467d991efb0372df60e9734cec3cb0b
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffnew.ru', which is likely the initial lure for the user. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to download and execute a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://traffnew.ru/aws?utm_term=free+5th+grade+worksheets PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367631/normal_5fc5e59f5bb23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385648/normal_5ff3f591df7f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369916/normal_5f920b304eb15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5f872e3d32779.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393359/normal_5fed74055344f.pdfIn PDF document text
    • https://cdn.sqhk.co/mivesumor/RSQ6hZ4/25474592291.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/zufaxepixiguxax/digital_electronics_full_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/48652351065.pdfIn PDF document text
    • http://fopekexu.epizy.com/xijeminelojozexikagalax.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/11493133627.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/awesomenauts_full_version.pdfIn PDF document text
    • http://gurepabe.epizy.com/allianz_travel_insurance_claims_form.pdfIn PDF document text
    • http://lubesugoninop.epizy.com/85180639671.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/manual_alarm_clock_wind_up.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/dalubugoviteviwesanipad.pdfIn PDF document text
    • http://dijovomivuz.rf.gd/augmented_reality_in_marketing.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_off0000e154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE154 5288 bytes
SHA-256: ab8da2798dfa7adc59fe7b1e14e1ab0225a4290e36b4f0ada12a74e549f2446d
font_01_sfnt_off0000f366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF366 10740 bytes
SHA-256: 066de15280af6b1520b8eeaca9b4d12e692343fba85c1b38a844ff72480f5e29

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