Malicious PDF — malware analysis report

Static analysis result for SHA-256 736e31f0e065cb7f…

MALICIOUS

PDF

82.3 KB Created: 2021-03-24 22:22:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1f7d519edcc6f939161b62b54e074a9f SHA-1: 993d00070f668a87c545366de074df63c3716cd3 SHA-256: 736e31f0e065cb7fbafa4a98c743450a0b593719ee90d52a1eaef5e9d9b66d08
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://dugedepap.ru/award?keyword=celebrate+good+times+lyrics+pdf PDF link annotation
    • http://itdiscounts.info/quickbooks_nonprofit_tutorial_freej9x1g.pdfIn PDF document text
    • https://cdn.sqhk.co/sutazojawote/Fhiijgf/owly_for_twitter_apk_pro.pdfIn PDF document text
    • http://bostpolamos.site/what_foods_to_avoid_to_reduce_stomach_fat134gw.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/5Mhdhi2/dokowefati.pdfIn PDF document text
    • http://ladyso.ru/navien_tankless_water_heater_instruction_manualz84pn.pdfIn PDF document text
    • https://cdn.sqhk.co/jowoluguwoge/eibmjeA/zombie_invasion_gif_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/Nie7Wgc/sirocco_wind_legend.pdfIn PDF document text
    • http://sodahq.club/18002140788mn924.pdfIn PDF document text
    • http://straponartist.com/22287176157jw00h.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/ls0OjfA/xunopizizakagivos.pdfIn PDF document text
    • http://rafupufubed.mypressonline.com/exercice_pour_avoir_confiance_en_soi.pdfIn PDF document text
    • http://dulexip.22web.org/kativopu.pdfIn PDF document text
    • http://wamebejifel.22web.org/fukojefikilatugezufuw.pdfIn PDF document text
    • https://cdn.sqhk.co/jozazixefuf/ipjihnN/75334946308.pdfIn PDF document text
    • http://babysampler.com/composite_chart_interpretation_astrologyn2cvl.pdfIn PDF document text
    • http://mandarins.space/tewowalorekibam0t6ce.pdfIn PDF document text
    • http://degimoto.22web.org/2205323810.pdfIn PDF document text
    • http://123dutch.com/tm_tt_phim_c_cng_hong_phi_s_kiu_truynkqoiy.pdfIn PDF document text
    • http://sadinexiwa.mygamesonline.org/kuzapodigagijapobexave.pdfIn PDF document text
    • http://bipowilago.mywebcommunity.org/le_pastoralisme_en_algrie.pdfIn PDF document text
    • http://educationonline.website/bachianas_brasileiras_no._5_sheet_music3e2gy.pdfIn PDF document text
    • https://cdn.sqhk.co/muvotugi/fhdjagc/dafosuzu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fisubilir.epizy.com/mukefofavazinurajamamuma.pdfIn PDF document text
    • http://jigugepolega.epizy.com/39213878975.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_off00010029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10029 5620 bytes
SHA-256: e01fda445c22aca130bdb9fb91b994b301ebf988b477aba647f742f076c04499
font_01_sfnt_off0001132e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132E 12880 bytes
SHA-256: 868994731954177d5fc0d13151c35c767b229d91b6e67932ef36e65c282e1a67

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