Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b31aa9710dc78ad…

MALICIOUS

PDF

109.4 KB Created: 2021-03-14 22:48:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7bb2be444dbfbf82256f4d895225a76e SHA-1: 3d72efba8396afb7c503763c61f158d81d69d07c SHA-256: 8b31aa9710dc78adf6cc356bd9202c80bd87a77d4b1412f81bd30be78425bd0f
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous external URLs, with one pointing to 'lozipotod.ru', suggesting a phishing or malware distribution attempt. The PDF structure and embedded URLs indicate it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://lozipotod.ru/award?keyword=sri+narasimha+kavacham+telugu+pdf PDF link annotation
    • http://sikalaporaka.22web.org/pelusopotaguzemosipenok.pdfIn PDF document text
    • http://pasadurasasagi.medianewsonline.com/rajilafatibedonikaz.pdfIn PDF document text
    • https://cdn.sqhk.co/jumivosokigo/lghuPif/java_jre_windows_7_64_bit.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/huEJBBB/download_game_san_andreas_crime_city_mod_apk.pdfIn PDF document text
    • http://sujabupinoda.scienceontheweb.net/the_chronicles_of_narnia_the_lion_the_witch_and_the_wardrobe_soundtrack_free_download.pdfIn PDF document text
    • http://setafugeridol.scienceontheweb.net/statistical_analysis_and_data_mining.pdfIn PDF document text
    • http://tozofuji.scienceontheweb.net/79419519749.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/jdmgiHF/rugby_league_championship_2019_results.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://ac09d6fb-20d1-47e2-97cb-2568fc137cdf.filesusr.com/ugd/03dcd4_0d7183d29eb34328950c001bde497eb0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/gta_5_100_speedrun_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/kefavuwaferemikoziku.pdfIn PDF document text
    • https://78905da9-dd21-4190-abaa-c894c042e703.filesusr.com/ugd/851c7c_131e02c8efab4d279eca669643d6639c.pdf?index=trueIn PDF document text
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_b9041759fb8448d1bccc482a45b926cb.pdf?index=trueIn PDF document text
    • http://rusapejuvovu.epizy.com/words_that_start_with_xi_four_letters.pdfIn PDF document text
    • http://wojuzixe.epizy.com/melunubijobotexapi.pdfIn PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_c2dacf8807bd4ed58f75c56bf4147906.pdf?index=trueIn PDF document text
    • http://wadarudi.epizy.com/therese_raquin_play_cast.pdfIn PDF document text
    • http://xaramoturowuf.rf.gd/sample_agile_transformation_roadmap.pdfIn PDF document text
    • http://fipamopiwip.epizy.com/42479707889.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/trainer_dawn_of_war_2_retribution.pdfIn PDF document text
    • http://kifagugurubox.rf.gd/adobe_indesign_beginners_guide.pdfIn PDF document text
    • http://wesovipimamino.epizy.com/centauri_dawn.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF039 5568 bytes
SHA-256: d0706f50a9f17c6caf56436ee3d37b0722f1250a375c96f1f309c3e709c825ec
font_01_sfnt_off000102f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F0 59296 bytes
SHA-256: 61abc3ac6d666642a535ff0debee289fac56e5ef9609d32541a4042af084cc0f
font_02_sfnt_off00017228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17228 11000 bytes
SHA-256: 9f933f3d9a054fae9bf4e6b36d56408c7e12adbfaa50dc209e90ff7b9fe66369
font_03_sfnt_off000197be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197BE 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333