Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cb477ad2d8ce762…

MALICIOUS

PDF

41.0 KB Created: 2020-03-08 12:09:24 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-08
MD5: 952a4bbf654600080b079da4bbb9ad7f SHA-1: c05528fa0662d26aba6539a423665b5dfb675757 SHA-256: 4cb477ad2d8ce76203dae35574e52950ea292ec396db2e5a61ee8eaa4507baae
136 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to similarly structured URLs on different domains. The document body, though partially corrupted, contains a URL related to 'ayurvedic medicine' and the PDF itself is generated by wkhtmltopdf, suggesting it's likely part of an SEO spam campaign or a link farm designed to drive traffic to potentially malicious sites. No scripts were extracted, limiting the analysis of direct payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://1tei2.slpny.com/uploads/1/3/0/2/130270855/130270855.html#best+ayurvedic+medicine+for+alcoholic+fatty+liver PDF link annotation
    • http://coloradonaturedoc.com/uploads/1/3/0/8/130814042/f7479efbc5.pdfIn PDF document text
    • http://seedorffmasonry.com/uploads/1/3/0/6/130639227/a22e98975f21.pdfIn PDF document text
    • http://moderncountrydoctor.ca/uploads/1/3/0/3/130323290/8fcb58.pdfIn PDF document text
    • http://theanxietyproject.org/uploads/1/3/0/7/130776474/329140.pdfIn PDF document text
    • http://knittedmetalfinery.com/uploads/1/3/0/7/130739537/mabusipetosu_wadimov.pdfIn PDF document text
    • http://www.originalsbykate.com/uploads/1/3/0/7/130738917/33ffe3bdd49e0bc.pdfIn PDF document text
    • http://www.ns1.elkethoms.com/uploads/1/3/0/5/130588220/tadasibo-mamosarisuwe.pdfIn PDF document text
    • http://cliquefashion.shop/uploads/1/3/0/3/130324050/fibifolutivapoxu.pdfIn PDF document text
    • http://missiescompletebeverageandbartendingservice.com/uploads/1/3/0/4/130477890/mivazipizolinof.pdfIn PDF document text
    • http://lookout-one-team.com/uploads/1/3/0/2/130287482/86d917119e.pdfIn PDF document text
    • http://www.episcopaldioceseofsc.org/uploads/1/3/0/6/130639347/wefajivuted-jixagifavukoj.pdfIn PDF document text
    • http://www.ocfertilitycare.com/uploads/1/3/0/6/130605341/zokejogewewutov_dikosumonuj_ripokofewavaw_momim.pdfIn PDF document text
    • http://red4edactionnc.com/uploads/1/3/0/4/130483653/35a7d395633.pdfIn PDF document text
    • http://bluequestconsulting.com/uploads/1/3/0/4/130476332/xekosedob.pdfIn PDF document text
    • http://www.nativebeesofnewengland.com/uploads/1/3/0/6/130620731/mufejiwade.pdfIn PDF document text
    • http://studiotiiu.bernardcassiere.fi/uploads/1/3/0/8/130873829/luroz-ruwejon-begete.pdfIn PDF document text
    • http://www.kavalashes.com/uploads/1/3/0/5/130544790/1822183.pdfIn PDF document text
    • http://nicolejzimmer.com/uploads/1/3/0/4/130435646/zafelagig_zelom_waxumise.pdfIn PDF document text
    • http://meaty.dk/uploads/1/3/0/8/130814110/jutidekozapawos.pdfIn PDF document text
    • http://tonicoindio.com/uploads/1/3/0/8/130814351/9200430.pdfIn PDF document text
    • http://www.maplegrovelandscapingpros.com/uploads/1/3/0/5/130588501/laligewufawa-dalaxedefegabu.pdfIn PDF document text
    • http://soil-solve.com/uploads/1/3/0/9/130969284/fotikagit_sorokofa_gidawobala.pdfIn PDF document text
    • http://anantio.com/uploads/1/3/0/5/130590353/sisosowuzosadekixo.pdfIn PDF document text
    • http://atelierspatz.de/uploads/1/3/0/8/130813592/wezekigebojaxip_xisenimakiga_gomedamog_zuwosuma.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

Related samples 1

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7877 7472 bytes
SHA-256: 96428fabd1010b569faaf2b71140d5414929394c846b6ae1caee4506f2b14e6b

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