Malicious PDF — malware analysis report

Static analysis result for SHA-256 81782b19d7ea9434…

MALICIOUS

PDF

67.6 KB Created: 2021-02-05 13:10:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f533da6581cc0639b4aa63600766a5ae SHA-1: 13dafa26deb741d276c6ab769688b313e1a68807 SHA-256: 81782b19d7ea94340aab9f08f8fa968129c2218a5ca852a29ed65764e3767b3d
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 a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'minecraft hacks' and 'wkhtmltopdf', suggesting a lure to a malicious site.

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://maypoin.ru/123?utm_term=wolfram+minecraft+hacks PDF link annotation
    • http://guwizerawefoke.iblogger.org/16626688623.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377408/normal_5ffe2534e3794.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/ijXfhci/2755070634.pdfIn PDF document text
    • http://detobusukited.iblogger.org/45987366308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_600f94e8a032a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489042/normal_5fc63ac65e166.pdfIn PDF document text
    • https://cdn.sqhk.co/mumaxifup/djiekhS/hd_rainforest_wallpaper_for_mobile.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379973/normal_60028dd0f1f41.pdfIn PDF document text
    • http://nizagose.66ghz.com/8123771383.pdfIn PDF document text
    • https://cdn.sqhk.co/xisofofumew/librifK/1657914245.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421983/normal_5fe0057da3703.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://ritarejameja.epizy.com/84652825107.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/hvding_cykelhjelm_manual.pdfIn PDF document text
    • http://kajufikuxididon.rf.gd/bhangarh_fort_video.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/acapella_app_picplaypost_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/webobokozarepipunume.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF9D 4984 bytes
SHA-256: 41ee59b4e2b6a5683a17f0a7f305633f70565816261bb06d351772735065d9db
font_01_sfnt_off0000d05d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05D 10276 bytes
SHA-256: fd3c9ffbb03c1b239ef9260ca1b50d92e3060629cf7587f9d8a30e61d190351a
font_02_sfnt_off0000f38c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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