Malicious PDF — malware analysis report

Static analysis result for SHA-256 78e382770542169f…

MALICIOUS

PDF

84.5 KB Created: 2021-04-20 18:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97a7e3cea68a6e7af06e52cd35ac7432 SHA-1: 94dd0ffb390159490e0a1f2aa4673df8a453e8a9 SHA-256: 78e382770542169fe32b4b9353fe33aab4874a8e8146e5288460dcff9d6e67fb
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/strik?utm_term=mechanical+engineering+intern+jobs
    • http://jobauthor.online/1956_johnson_10_hp_outboard_manual339pt.pdf
    • http://raxejudesezix.scienceontheweb.net/asset_integrity_management_system.pdf
    • http://myluckybet.xyz/penguin_readers_level_4nd9d6.pdf
    • http://guparob.mywebcommunity.org/nepufejuz.pdf
    • http://buloshnaya.site/64448840515rh6mh.pdf
    • https://vitasexabu.weebly.com/uploads/1/3/0/8/130813400/822334.pdf
    • http://mizafaroremida.getenjoyment.net/lafixigisuzuregasu.pdf
    • http://kemutedetabu.scienceontheweb.net/que_es_inotropismo_y_cronotropismo.pdf
    • https://fepiwifir.weebly.com/uploads/1/3/4/6/134676425/6925328.pdf
    • http://loduwij.scienceontheweb.net/valevubukezoluw.pdf
    • http://kitukotobov.medianewsonline.com/antecedentes_de_la_policia_en_mexico.pdf
    • http://lajafago.medianewsonline.com/stony_brook_university_map.pdf
    • http://bagesopabiwub.scienceontheweb.net/vizadesoj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/24c82199-841a-4398-86f6-018a22e15870/presto_pressure_cooker_01755_manual.pdf
    • https://s3.amazonaws.com/vawoginele/2773922510.pdf
    • https://uploads.strikinglycdn.com/files/87bc5b86-0430-477c-9213-b06f0b06bb0a/3rd_grade_reading_book.pdf
    • https://uploads.strikinglycdn.com/files/ae7e9156-aecf-4f53-9dc7-49dc06346198/lajuvevagifu.pdf
    • https://s3.amazonaws.com/dezajok/19756386465.pdf
    • http://jirabasojexosud.atwebpages.com/jirepenig.pdf
    • https://s3.amazonaws.com/ronenitevodo/lusosorenezig.pdf
    • https://uploads.strikinglycdn.com/files/132cc154-615e-4a80-9f0f-835d06d31104/29744060823.pdf
    • https://s3.amazonaws.com/tujeviwakirawu/dog_man_book_10.pdf
    • https://s3.amazonaws.com/litunux/10416361970.pdf
    • http://vamavaremimot.atwebpages.com/pitegedorabove.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
stream_002_off0000de3e.bin
2403584096115616f56c50761ccc2942ecb3ecb3f27604d83b799a6d31a4d025		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDE3E 14540 bytes
font_01_sfnt_off00010c83.bin
a30061b6a08568fc6339a9ec4f0688c4fd2f94af9fae2a3d9ed3461c33c49cc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C83 5280 bytes
font_02_sfnt_off00011e81.bin
89e18953a4cac2cce23b390bc597e6d0a8cbc005801ff49bd7f96776427d0505		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E81 10952 bytes

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