Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa831e04f28f0f71…

MALICIOUS

PDF

86.6 KB Created: 2021-03-07 21:14:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4b51789a2a73b712a9c594eae3f13dd9 SHA-1: 77bb3a92c42661e3ae568088616571b14c87a8c6 SHA-256: fa831e04f28f0f71f7b8fd1fb87feaa6d7b5b2e25d72dacd07d8c934eb573df4
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, particularly one pointing to 'fokemale.ru', suggests a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, likely as part of a spearphishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://fokemale.ru/wix?keyword=run+n+gun+i+love+cats PDF link annotation
    • http://saudiautoinsurance.com/pivobuli511zk.pdfIn PDF document text
    • http://banquepopulaire-fr.org/1768379656v4c0g.pdfIn PDF document text
    • http://zarabatyivat.ru/how_to_set_up_a_volunteer_programp6cip.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/ahbihPQ/airpods_black_friday_deals_2019_target.pdfIn PDF document text
    • http://confirmationhelpcenter.com/samsung_galaxy_core_prime_battery_issuevfand.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/hg8iegf/life_and_death_quotes_in_fahrenheit_451.pdfIn PDF document text
    • http://trend-sales.fun/my_talking_angela_apk_download_for_pch0myb.pdfIn PDF document text
    • http://stnold.com/85803672766942tt.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/hfhfpwN/98323911552.pdfIn PDF document text
    • http://vawuzusodiguse.iblogger.org/gabofozojimiriroxuzabif.pdfIn PDF document text
    • https://cdn.sqhk.co/bitowiso/hdii0zA/91337643170.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jurezep.epizy.com/najajozodexib.pdfIn PDF document text
    • http://vabizofolimise.epizy.com/dd_cleric_spells_3.5.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/dungeon_crawl_stone_soup_necromancer_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/kemusudinepujesokid.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/42526499624.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/dilbar_dilbar_song_dance_performance.pdfIn PDF document text
    • http://zaxesagujudiwa.epizy.com/jevutexosozogoniturukefov.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/wedding_anniversary_hd_images_free.pdfIn PDF document text
    • http://rokopive.epizy.com/14222378562.pdfIn PDF document text
    • http://jimatisejur.rf.gd/jisijulatukomuximu.pdfIn PDF document text
    • http://sukidagijonola.rf.gd/jasper_report_studio_date_format.pdfIn PDF document text
    • http://duvufewitopemaw.rf.gd/chura_liya_song_ming.pdfIn PDF document text
    • http://gorevifero.epizy.com/chemguide_dehydration_alcohols.pdfIn PDF document text
    • http://piredesoki.epizy.com/http_android_tv_com_setup.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001074a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074A 4408 bytes
SHA-256: be247bcf22777c8551bcf1d7aadc5be6aac237d64d2b9bb55357563c0125e3dc
font_01_sfnt_off0001169b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169B 4940 bytes
SHA-256: e89cace9ed767411337b277662e64b775e2de31a146758a6940dcee8ec62497e
font_02_sfnt_off0001278e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1278E 10872 bytes
SHA-256: c74415835b6077a4c186ec05188d71e2f5f68f3d517cf87392b11539b3bd2736

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