Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d32b034dded428e…

MALICIOUS

PDF

85.5 KB Created: 2021-03-17 05:16:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b50e9b6d03780ef8c2009d14f069dfb1 SHA-1: 6ff9c692bc0f8021c63c20dbc0689295e1dec514 SHA-256: 3d32b034dded428e2b7aab08661fc6d4370aaf4ef1efc51ee1c87f9f75267874
126 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 numerous embedded URLs, with a prominent one being 'https://resalured.ru/strik?utm_term=ti+84+plus+ce+calculator+batteries', suggesting a lure to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host many links on disposable domains, further supporting a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • 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/strik?utm_term=ti+84+plus+ce+calculator+batteries PDF link annotation
    • http://fuwakesesul.22web.org/69865324514.pdfIn PDF document text
    • http://nezowigivomi.scienceontheweb.net/85581841457.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/brahma_kumaris_daily_murli_in_tamil.pdfIn PDF document text
    • https://gixoloxivut.weebly.com/uploads/1/3/4/0/134040336/roxatag-zizuwinuge.pdfIn PDF document text
    • https://mugakosi.weebly.com/uploads/1/3/1/3/131379948/6b745181f.pdfIn PDF document text
    • https://kutisujazuj.weebly.com/uploads/1/3/4/6/134625744/kuzamefexurufoji.pdfIn PDF document text
    • http://zovanatul.iblogger.org/castrol_hypuron_15w40_product_data_sheet.pdfIn PDF document text
    • https://safodejinuvi.weebly.com/uploads/1/3/4/7/134753113/5dc0c03.pdfIn PDF document text
    • https://komijeji.weebly.com/uploads/1/3/1/6/131606126/kobakugadotojis.pdfIn PDF document text
    • http://sijemogezabusa.sportsontheweb.net/lazarillo_de_tormes_completo.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/how_often_to_change_transmission_fluid_honda_crv_2016.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f1c0478e-57b3-422a-b8eb-433964b677d2.filesusr.com/ugd/16c17d_f3f2ba32876a4921afbc09ba5f7d72d1.pdf?index=trueIn PDF document text
    • http://kiziwekez.rf.gd/cuisinart_pro_classic_7_cup_food_processor_dlc-10sy.pdfIn PDF document text
    • http://mubapumasas.epizy.com/16665820045.pdfIn PDF document text
    • http://kifemulawej.epizy.com/windows_10_software_crack_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/37505126575.pdfIn PDF document text
    • http://zirikefemeto.rf.gd/bemat.pdfIn PDF document text
    • http://nosekaj.epizy.com/cash_flow_template_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/begirila.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/gijoraxidi.pdfIn PDF document text
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_f9af8cb19fe243809733e4c337a45385.pdf?index=trueIn PDF document text
    • http://rujewaridulev.rf.gd/lojepijado.pdfIn PDF document text
    • https://c480cc3d-c044-45b7-a7fa-747782367dcd.filesusr.com/ugd/a26f59_43f5b68e953d44288a7c3bdcec875306.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/buwosevax/motorola_g6_plus_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/kepenabekugosesukor.pdfIn PDF document text
    • http://laxizal.epizy.com/how_to_redeem_staples_rewards.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C60 5296 bytes
SHA-256: 27f836c2a99c535e3ddbbd1aac8c66efe9d4f284b7b976d6fdf125cdc3425ac3
font_01_sfnt_off00011e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E75 11796 bytes
SHA-256: 9191152b0ac19db9a67fa8a5d997740bf2710ba1936354a4f9224f9ed6b3a42d

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