Malicious PDF — malware analysis report

Static analysis result for SHA-256 1588ab1ebae90ce2…

MALICIOUS

PDF

103.6 KB Created: 2021-03-11 03:11:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 207fc1076ed33658e3bb4d897b69cd24 SHA-1: 48e4121224ffc01dfbf8e5beedf6ca8030d54a6a SHA-256: 1588ab1ebae90ce2e3813399a12bf7145ee60e7b3b235b136a469650ca5ad9fe
126 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. The document body, though heavily obfuscated, contains references to search terms like 'how to find per capita income' and embeds numerous URLs, suggesting a lure to phishing or malware download sites. The presence of external URI heuristics and link farm detection further supports the malicious intent of directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wb?keyword=how%20to%20find%20per%20capita%20income PDF link annotation
    • http://fopokigife.mywebcommunity.org/egregious_eleven.pdfIn PDF document text
    • https://rixifumalig.weebly.com/uploads/1/3/1/4/131437092/pezedupumegas.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuviju/jeRiJ4A/skullduggery_island_book.pdfIn PDF document text
    • http://mujuwowewo.22web.org/tinedidudipujujofuri.pdfIn PDF document text
    • http://waferaboteb.mypressonline.com/census_in_research_methodology.pdfIn PDF document text
    • https://vigenuwotefi.weebly.com/uploads/1/3/4/0/134012497/730545.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/agjbDgd/fetajaxabutozorav.pdfIn PDF document text
    • https://gavixidosoxadi.weebly.com/uploads/1/3/0/7/130776067/fegube-xanuzajifemito-getawonotavube.pdfIn PDF document text
    • https://daxusumupazi.weebly.com/uploads/1/3/4/7/134702932/787e1c8.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/brother_tn_420_drum_reset.pdfIn PDF document text
    • https://tiruzezisuwef.weebly.com/uploads/1/3/4/4/134499189/fizika.pdfIn PDF document text
    • http://madoxorijegobe.sportsontheweb.net/gokutuwi.pdfIn PDF document text
    • https://cdn.sqhk.co/notizejamebo/nAFhevX/sutoduletejaxivodim.pdfIn PDF document text
    • https://cdn.sqhk.co/xoradofexul/aZieVgg/this_is_anfield.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://vakogez.myartsonline.com/dibijevazabesage.pdfIn PDF document text
    • https://27475d5a-2981-497d-8cd5-0c310ef10f8b.filesusr.com/ugd/9cb927_4ebc0323fb844b61b8ecaaf3afbf9b33.pdf?index=trueIn PDF document text
    • http://fepexunigamof.rf.gd/ayyappa_bhajan_songs_telugu_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/12829586500.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/39454278902.pdfIn PDF document text
    • http://wunekoxewufomaf.epizy.com/jiwekirufubim.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/43020848588.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/868478122.pdfIn PDF document text
    • https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_e3635e0555c14c73b3ba7ed049caf445.pdf?index=trueIn 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_off00014b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B1D 4932 bytes
SHA-256: a51f1e30def5187bb963dd95596ebda3c890f74287b46aa3cb09be007998a941
font_01_sfnt_off00015bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BD3 11552 bytes
SHA-256: 61861352404e6f71a0fcb155e4e0ceb1a0bd95ba99819f6925eddfb7f7a65ede
font_02_sfnt_off000182ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182EF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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