Malicious PDF — malware analysis report

Static analysis result for SHA-256 5abba9e22ac3b3eb…

MALICIOUS

PDF

108.8 KB Created: 2021-03-30 02:59:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f48eae3b11dab2b0a6c4597d86261fe SHA-1: 7d7b6e1f4124fcdae248dee02933152806c08412 SHA-256: 5abba9e22ac3b3eb86493395ba27020bd28a8d2d9752f7670cb0a2cbd3caa339
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, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host or deliver a secondary payload. The document body, though heavily obfuscated, suggests a lure related to 'worksheet answers'. No scripts were extracted, but the presence of external URIs and the overall detection profile indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://lozipotod.ru/wix?keyword=drawing+bohr+models+worksheet+answers
    • https://cdn-cms.f-static.net/uploads/4411498/normal_6022c186438f2.pdf
    • https://static.s123-cdn-static.com/uploads/4478398/normal_5ff4976e137fd.pdf
    • https://cdn-cms.f-static.net/uploads/4393486/normal_603cfdb858aad.pdf
    • https://static.s123-cdn-static.com/uploads/4381978/normal_5ffbbacb53c76.pdf
    • http://pixidilivutep.medianewsonline.com/3598492210.pdf
    • https://diwijavel.weebly.com/uploads/1/3/4/6/134691177/sulob_zojogep_tekomab_nidure.pdf
    • https://static.s123-cdn-static.com/uploads/4473632/normal_5fcac918a774c.pdf
    • http://wotaxatumumodok.sportsontheweb.net/iq_option_candlestick_strategy.pdf
    • https://bubiwodepu.weebly.com/uploads/1/3/2/8/132815961/8760719.pdf
    • https://cdn-cms.f-static.net/uploads/4417123/normal_602eb205d64bc.pdf
    • https://cdn-cms.f-static.net/uploads/4464067/normal_60123302a82f0.pdf
    • https://jegivobepumo.weebly.com/uploads/1/3/4/4/134444156/9511109.pdf
    • https://monivewuvafa.weebly.com/uploads/1/3/4/0/134096064/18563.pdf
    • http://bisituz.sportsontheweb.net/borifabig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://buxidogekalor.rf.gd/fawakikimi.pdf
    • https://s3.amazonaws.com/mejifavo/amalfi_coast_travel_guide_amazon.pdf
    • http://danofef.rf.gd/20799797532.pdf
    • http://wupafar.rf.gd/83249651026.pdf
    • https://s3.amazonaws.com/bulalowisu/goodbye_lullaby_avril_lavigne_album_free.pdf
    • https://s3.amazonaws.com/vovabagubajegeb/erasmus_2020_programme_guide.pdf
    • https://s3.amazonaws.com/fuzafuzeruwit/niragebipupuvofiliwimum.pdf
    • https://s3.amazonaws.com/sitok/figewemobemiramagizigu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000162db.bin
a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x162DB 2828 bytes
font_01_sfnt_off00016cd5.bin
7270fb097f17dd33f9fb4bedf0282501defc1be31ed40a44244a4d65cd378e5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16CD5 5532 bytes
font_02_sfnt_off00017f8a.bin
4ce9e10a6c96c099c6ba355b60dfec6b75c1486a3b8bf279eb7f6cb69415ddb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17F8A 10360 bytes

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