Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd140ddea0861be…

MALICIOUS

PDF

76.3 KB Created: 2021-03-06 19:46:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 714a507496cd29fe53c6697e894e61c3 SHA-1: a1525f3c255b228fa6b2397dec73a8b27d00f4a7 SHA-256: 2bd140ddea0861be113e7a6661a67d57add8e462a4746147a32580061c4ba6d2
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded URLs pointing to suspicious domains, including one that appears to be a link farm. The document body, though heavily obfuscated, suggests a lure related to 'problem statement science', likely to trick users into visiting the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/wix?keyword=problem+statement+science PDF link annotation
    • http://kungfumalibu.com/dorebasbcm8.pdfIn PDF document text
    • https://powelogub.weebly.com/uploads/1/3/1/8/131871449/be25dffb06d.pdfIn PDF document text
    • http://promoocaoameericanas.com/sony_semi_pro_dslr_cameravcveu.pdfIn PDF document text
    • http://getfreecreditreport.info/desi_bhangra_song_mp4s47s8.pdfIn PDF document text
    • https://jovigazever.weebly.com/uploads/1/3/1/6/131637362/0ba5f4eded09f.pdfIn PDF document text
    • https://biteledazuxol.weebly.com/uploads/1/3/4/3/134315761/xemuzaraj-jazuwekizexep.pdfIn PDF document text
    • http://gajozemexip.22web.org/twilight_movie_themes_for_android.pdfIn PDF document text
    • https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/dizifazezizot_menimin_bobidamorodixom_zubin.pdfIn PDF document text
    • http://civiliscmq.online/how_long_do_you_cook_a_brisket_in_a_roaster_ovenni0ft.pdfIn PDF document text
    • http://yourcy.com/how_many_square_meters_is_a_football_field_australia6dlo7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lunujebof.rf.gd/the_elaborate_entrance_of_chad_deity_script.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/28293017305.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/c_o_c_game_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63927e0d-96ff-42c2-afe7-d95248eecaa2/how_to_unlock_air_conditioner_remote_control.pdfIn PDF document text
    • http://zatupux.rf.gd/lanedopame.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/basic_heat_and_mass_transfer_mills.pdfIn PDF document text
    • http://zimemotom.rf.gd/zisegetulorolepiwufarob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/753c8f27-0315-475e-b92f-47b981be4221/wovozutabek.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/gazipabifudufowipuzorid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/112b8043-bd50-40de-a68e-033c58407d81/toro_lawn_mower_20332_air_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8c84403-1d9f-4be5-95f9-7fa54ca6ae95/tiburufajibisudifusupoje.pdfIn PDF document text
    • http://sexikiti.epizy.com/44548986254.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_off0000f083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF083 5084 bytes
SHA-256: caac08b8a048ae4a9b743a27de8a562528e5e09602fab4b16020522411bebbe8
font_01_sfnt_off000101af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AF 9984 bytes
SHA-256: 7b7b1aa9909fd3f78a7d2b5bd471b3e50526c60ccce8a6d0736c47e98c0dc428

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