Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff8a51b21091d80…

MALICIOUS

PDF

77.5 KB Created: 2021-03-20 10:00:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 50ba98fdfaebff5bb96ed56e21c4ae2e SHA-1: bde781581f00de374a454d097353f7e322dbd34e SHA-256: bff8a51b21091d805a559291b4095056b3adfedd3c9dec6007807a54490283ea
156 Risk Score

Malware Insights

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

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 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/strik?utm_term=how+to+use+norelco+7000 PDF link annotation
    • http://tcerkovniekupola.space/enter_the_kettlebell_or_simple_and_sinisterb7jl3.pdfIn PDF document text
    • https://vewirorerisemi.weebly.com/uploads/1/3/4/6/134627211/vugatogolobi-xujuzuzoruxe-lidere-monogomeku.pdfIn PDF document text
    • http://rm-swis-mine.com/vuwonubajejubenup5ecur.pdfIn PDF document text
    • http://chelamela.org/wabibej4ehbs.pdfIn PDF document text
    • http://tradestaroffice.com/99862917174kj11m.pdfIn PDF document text
    • http://dreamingdeveloper.com/honeywell_9_series_wireless_portable_doorbell_with_halo_light_and_push_button_-_rdwl917axg734o.pdfIn PDF document text
    • http://worldthailand.fun/gibabetesuwaputesdjk1g.pdfIn PDF document text
    • https://jewelilug.weebly.com/uploads/1/3/4/3/134331877/geguvelatasemu.pdfIn PDF document text
    • http://lightly.store/fuzivopudeluvalotazm2j0.pdfIn PDF document text
    • http://hookup666.site/what_is_text_in_the_biblejm6i0.pdfIn PDF document text
    • http://detonic-hypertonie.website/pages_to_use_for_blackout_poetry1fqk6.pdfIn PDF document text
    • http://roskycnmx.com/11244721666qk3lt.pdfIn PDF document text
    • https://nunofisodopuw.weebly.com/uploads/1/3/4/2/134234763/9284537.pdfIn PDF document text
    • http://triple-doska6.club/canon_pixma_mg3520_scanner88064.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sudevejerifu/shilpa_shimle_waliye_hd_video.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/zoxod.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/tolatojedegixuw.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/mupokajinudositokala.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/response_noun_synonym.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/81601472017.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/acer_s231hl_specifications.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE492 4692 bytes
SHA-256: 1c9dc45e724927e24c09546a0736464f8116f82ddbe96d65692fdacaac2ce4f8
font_01_sfnt_off0000f4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A9 11220 bytes
SHA-256: 8cf96e7f96594d5d86cd7deb23e0c43b0c5358247f56b9f6e023370ccee0cb40
font_02_sfnt_off00011ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE2 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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