Malicious PDF — malware analysis report

Static analysis result for SHA-256 937d9d34f284a966…

MALICIOUS

PDF

85.8 KB Created: 2021-03-28 01:40:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c19469e385974215070198daa121a6f6 SHA-1: b11a8695371d8f5b32cdb9928c478133e56f6357 SHA-256: 937d9d34f284a9669cceabd3a2cabc2671941d3fcf5a46690f4c854a58712256
136 Risk Score

Malware Insights

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

The sample is identified as malicious by a machine learning classifier and ClamAV, with heuristics indicating it is an advance-fee scam lure. The presence of an external URI points to a potential download or redirection. While no scripts were explicitly extracted, the PDF format can embed JavaScript, which is often used to facilitate malicious actions like downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://leonvi.ru/award?keyword=panera+boxed+lunch+pdf+menu
    • https://static.s123-cdn-static.com/uploads/4470524/normal_5fe42ebad5283.pdf
    • https://cdn-cms.f-static.net/uploads/4460228/normal_6045d5a9b5113.pdf
    • https://jadusulad.weebly.com/uploads/1/3/4/7/134764450/todimuzajore.pdf
    • https://cdn-cms.f-static.net/uploads/4372101/normal_600b726d1edff.pdf
    • https://tulalesin.weebly.com/uploads/1/3/4/8/134876190/22dc63556e039.pdf
    • https://sarajifig.weebly.com/uploads/1/3/2/7/132710715/begiv.pdf
    • https://buzijivugaza.weebly.com/uploads/1/3/4/7/134709386/vaneso.pdf
    • https://rowexajezer.weebly.com/uploads/1/3/0/7/130776500/fodagegimex_wokivurupig_zuregogabuja.pdf
    • https://simepatu.weebly.com/uploads/1/3/4/2/134267103/da26ad.pdf
    • https://cdn-cms.f-static.net/uploads/4393628/normal_5fdc64c0cf33f.pdf
    • http://dixajarinuvaw.iblogger.org/mesivakunabo.pdf
    • https://bajumavo.weebly.com/uploads/1/3/4/4/134486103/bifobo-geduxofuri-xovavodizexis-rijamobegex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://gupezifiromok.epizy.com/assassins_creed_brotherhood_book_review.pdf
    • https://uploads.strikinglycdn.com/files/33deded8-75f3-43c7-90e1-55cfe29dff45/el_conde_de_montecristo_libro_sinopsis.pdf
    • https://uploads.strikinglycdn.com/files/1cfe2e8a-bd36-4375-99bf-c8bcabe48220/tortilla_flats_arizona_weather.pdf
    • http://zimipasazodid.rf.gd/azo_dyes.pdf
    • http://kedukalof.epizy.com/free_coding_courses_for_beginners.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_off0001038f.bin
60e2446fa1f8846f33eb0a3728bbdbbc619c7756123936080d994e7f16f9a189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1038F 5180 bytes
font_01_sfnt_off000114f6.bin
9aa3a4dcd0d339abb791b65c0ee6e9a257377e732ad4e8d1b71160d3a51b3696		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114F6 11516 bytes
font_02_sfnt_off00013bd7.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD7 4324 bytes

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