Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a833ec16e5d1d10…

MALICIOUS

PDF

77.1 KB Created: 2021-03-14 01:28:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e2dda967a5fa8c9cb2a0c7cd2a62b701 SHA-1: 6ce246883fc8f4a475426fad5545c8db4e1f1c76 SHA-256: 4a833ec16e5d1d10dfb1dff2ceba723722780b815d485b3afce749a19b579732
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many of which point to disposable hosting and are likely used for phishing or to distribute further malware. The document body, though heavily obfuscated, appears to be a lure related to search terms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/wix?keyword=put+tony%2527s+nuts+in+your+mouth+book+pdf PDF link annotation
    • https://cdn.sqhk.co/zewulutaj/dNAcYgg/dylan_scott_songs_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/dikizumi/k4Tp1gj/dixajapatiz.pdfIn PDF document text
    • http://menetufebev.22web.org/don_t_stop_believin_sheet_music_easy.pdfIn PDF document text
    • https://sarutofujatazix.weebly.com/uploads/1/3/4/5/134584212/c10526bdb5d.pdfIn PDF document text
    • http://tudovawo.22web.org/31714832529.pdfIn PDF document text
    • https://vejotawugupexo.weebly.com/uploads/1/3/4/7/134756202/9ec80.pdfIn PDF document text
    • https://napepoxamugif.weebly.com/uploads/1/3/3/9/133997580/wezatokumulun.pdfIn PDF document text
    • https://mebodamuruwij.weebly.com/uploads/1/3/5/4/135400263/51a1c8946684967.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/kja9jat/argos_white_triple_bunk_beds.pdfIn PDF document text
    • http://duwasedate.iblogger.org/editable_newspaper_template.pdfIn PDF document text
    • https://mubuxepuvu.weebly.com/uploads/1/3/1/3/131383429/nisurexavis-kuril-bakikela-diketeva.pdfIn PDF document text
    • https://cdn.sqhk.co/negolura/ixUgihh/4558188961.pdfIn PDF document text
    • http://jixapijojuxev.iblogger.org/dosofitekon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2987c0f4-171e-4473-b3f1-a5468658115b.filesusr.com/ugd/75ff8a_992c9e6b709142df944070e226c9fbe4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nefagolom/passport_size_photo_template_a4.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/52386034812.pdfIn PDF document text
    • http://dedumiwikos.epizy.com/how_to_connect_xfinity_remote_to_onn_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/contraptions_workshop_fallout_4.pdfIn PDF document text
    • http://tolimimagag.epizy.com/12117_county_road_excelsior_springs_mo.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/drawing_a_creative_process.pdfIn PDF document text
    • https://c931c956-7f53-4e4e-96dc-27d7f003ba63.filesusr.com/ugd/b80c10_3e4de752051a47d1be603ee382141f0c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/lozelotuzopilulezuni.pdfIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_6a3b296ccc87498b8aef3671cb23bc01.pdf?index=trueIn PDF document text
    • http://mepaduk.rf.gd/crusaders_of_light_ranger_guide_2018.pdfIn PDF document text
    • http://wixesazu.epizy.com/venous_malformation_liver_radiology.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_off0000ec46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC46 5380 bytes
SHA-256: cb60f9161a156fc2dffc6c8fa222eea20c8f2849a05b6811318026e1efd6c5da
font_01_sfnt_off0000fe73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE73 11212 bytes
SHA-256: 40b01f0fe3df5d376a362e930bf7f968785c543b0e50b87b148bbc5a4a19d9bb

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