Malicious PDF — malware analysis report

Static analysis result for SHA-256 74e99738aaf0088b…

MALICIOUS

PDF

74.9 KB Created: 2021-03-07 10:52:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2e2c087c754b1a8a6dbf8dc4fb91d268 SHA-1: 3843424f32c42501d4c8f9921f53cf661ec62ad0 SHA-256: 74e99738aaf0088bace9719ad7bfb657411b90912f6ca41051a6522dd5e41af5
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. The document body, though heavily corrupted, contains text related to appliance repair, likely used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://gimoguvi.ru/wb?keyword=how%20to%20replace%20whirlpool%20duet%20washer%20drain%20pump PDF link annotation
    • https://lewovabarififu.weebly.com/uploads/1/3/1/4/131453312/ninasimofad.pdfIn PDF document text
    • https://nuzozixajalupik.weebly.com/uploads/1/3/0/7/130739607/646268.pdfIn PDF document text
    • http://bumosid.getenjoyment.net/google_nexus_10_tablet_update.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386594/normal_5fd61a41bef21.pdfIn PDF document text
    • http://xiwupulo.medianewsonline.com/ong_orality_and_literacy_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_600d956a9f822.pdfIn PDF document text
    • http://nomokesus.sportsontheweb.net/midesigemetelokolorama.pdfIn PDF document text
    • https://pekatizofu.weebly.com/uploads/1/3/0/7/130739174/06850fa622f926f.pdfIn PDF document text
    • https://jeregixir.weebly.com/uploads/1/3/1/3/131381720/2611541.pdfIn PDF document text
    • http://pogolaf.iblogger.org/aitken_spence_plc_annual_report_2015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493891/normal_5fdbda8f43f41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478123/normal_6044251fa611b.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/kenmore_gas_stove_parts_amazon.pdfIn PDF document text
    • http://pukoruserega.22web.org/wonafitutetelunex.pdfIn PDF document text
    • http://pufivuziviv.mypressonline.com/vakirugezusiruvonub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460706/normal_602c62352abda.pdfIn PDF document text
    • https://lanapovo.weebly.com/uploads/1/3/1/4/131437145/latimodedeganivugo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rususekobijo.myartsonline.com/1293922063.pdfIn PDF document text
    • http://fanevisexika.epizy.com/sec_butyl_formate_structure.pdfIn PDF document text
    • http://fabevax.myartsonline.com/how_to_stop_breast_pain_during_breastfeeding.pdfIn PDF document text
    • http://zavozolumox.rf.gd/california_common_core_standards_second_grade_social_studies.pdfIn PDF document text
    • http://vesedakowata.onlinewebshop.net/walther_pk380_review.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/petta_audio_launch_full_video_isaimini.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/dumbledore_s_army_minecraft_guide.pdfIn PDF document text
    • http://zanebinelit.rf.gd/wipudawawojuko.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/addons_maker_for_minecraft_pe.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/what_is_the_mandate_of_heaven_and_how_does_it_work.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/rational_inequalities_worksheet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16C 5368 bytes
SHA-256: 70d8a36df10db49048458ac1703a4fd1b5288d0fac5436a7634697c7c603a084
font_01_sfnt_off0000e386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE386 9928 bytes
SHA-256: e8ac9f5e924fd8e94b9a548a76902f579ef85bc4f9140cd65e502be8fb48b151
font_02_sfnt_off000105ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BA 16812 bytes
SHA-256: 20a606b0ff3ffa0e5be7448e95a80dff09c22eaaba33d7e268586920c847b386

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