Malicious PDF — malware analysis report

Static analysis result for SHA-256 be8854c73fb0bdfd…

MALICIOUS

PDF

69.9 KB Created: 2021-05-01 17:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 77e04a67b2330293aa126f792e0a420f SHA-1: ea8a721e6f455127c723c9bba5004e01aa38459c SHA-256: be8854c73fb0bdfd3f7292e24105058a835dc0b7a43a5bb252d370ce69ec13b0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary focus on 'maypoin.ru', identified as a link farm and potentially malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'future perfect progressive tense exercises'.

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://maypoin.ru/strik?utm_term=future+perfect+progressive+tense+exercises+with+answers+pdf PDF link annotation
    • http://fobativ.mywebcommunity.org/lelafuletupusubomixuja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449187/normal_6038c5555b852.pdfIn PDF document text
    • http://zefujixa.mywebcommunity.org/system_analysis_and_design_notes_download.pdfIn PDF document text
    • http://trokot-shopnew.online/77909032644rrlph.pdfIn PDF document text
    • http://trysalon.xyz/802123789780y7ug.pdfIn PDF document text
    • http://vezerfa.xyz/atlas_copco_compressor_parts_near_mehfcc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379370/normal_5fc79e1ac1921.pdfIn PDF document text
    • http://domastmsk.space/47369312973xdjmw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384628/normal_60387129a3ce9.pdfIn PDF document text
    • http://dorutote.scienceontheweb.net/duzesaxeta.pdfIn PDF document text
    • http://gufutaca3.xyz/125426767127ivhz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/supreme_mathematics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e11a0aa-26b0-48f4-b54e-b09208323092/nogexivanuzekaraxabudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a4720be-af8a-4473-b890-f96d44dac8c8/john_deere_lx280_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/wizemezugezovoxes.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/video_songs_free_malayalam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87fb237f-5e47-438a-836c-39d6543cb492/coggle_simple_collaborative_mind_maps_and_flowcharts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b97d324-49d7-49c8-ab2e-73d875736dfc/samsung_hw-j355_power_cable.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/10170610440.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/dog_vaccination_schedule_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f77ea74-6766-4a67-a607-d04e47dd51a7/how_do_i_setup_arc_on_my_yamaha_receiver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d5c21e3-f8d8-46e6-825b-2802eb8c4b85/mesojujosuzugigiletuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac752471-9caf-4240-b2d0-98d5b5d94408/mechanics_of_materials_chapter_3_solution_manual.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_off0000d2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A4 5560 bytes
SHA-256: 62fba9c215983c09b5bb918c881dcf05c3615d8a48d33cd1e8863db0f5db557c
font_01_sfnt_off0000e5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A7 10552 bytes
SHA-256: 5f64cd30f6e02d62c8a6fd8ea8607af2b530594760f486ceee922da719d4724c

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