Malicious PDF — malware analysis report

Static analysis result for SHA-256 d618a58a93d76032…

MALICIOUS

PDF

76.3 KB Created: 2021-03-01 00:54:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2883f00e9b3ce39e44cdbde1e40399b9 SHA-1: 033780ba1c4ab180e6adf447c194c33cb4b70424 SHA-256: d618a58a93d76032bdad30243317cc5f72debccd53e15e9e50b189f3fb72c0b1
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, appears to be a lure related to appliance troubleshooting, a common social engineering tactic.

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://resalured.ru/strik?utm_term=why+does+my+maytag+dryer+keep+blowing+the+thermal+fuse PDF link annotation
    • https://cdn.sqhk.co/fazituku/hhtnhgq/baller_shot_caller_20_inch_blades.pdfIn PDF document text
    • http://formverifiedbadge.com/what_is_computer_for_students0qqab.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/cfEOw1j/dusumomotinadukujapajax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496151/normal_5ff3b0d759cc1.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/VhjjecU/cake_recipe_for_dogs_uk.pdfIn PDF document text
    • http://koprovk.xyz/bogibimakuniidgu0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387933/normal_5fd1d5a27bc05.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/bjgihFx/nomazujeb.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/cidGigq/duvatotukaxedubufujinag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390641/normal_5ffb74889a2ed.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/bagisi/house_construction_estimate_spreadsheet_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/83450189658.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/farewell_to_manzanar_sparknotes_chapter_11.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_off0000ebc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC0 5868 bytes
SHA-256: f7cefc24ce738f2f16b7f1bff0a7802944296f501e45c13513d9c8652ebf53a2
font_01_sfnt_off0000ffa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA9 10624 bytes
SHA-256: b6dbf7ba60c9ffca86ff953ede8302de624320b2c27bab31a0c22d51f1fbdbff