Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb4cf893463a246…

MALICIOUS

PDF

37.5 KB Created: 2020-05-17 13:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: af0601d03bf888b2aacd7420c55edf82 SHA-1: 500e45616c7db72e9b27a697d23dee3c6a8f229b SHA-256: aeb4cf893463a246ce8058c2ba8ff5d83d4eecb3284ba74282f61ad092e5f2a0
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, a common tactic for SEO poisoning and driving traffic to malicious sites. The document body text, though partially corrupted, suggests a lure related to an 'Excel contingency table template'. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm designed to manipulate search engine results. The primary intent appears to be directing users to potentially compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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 http://thegetaheadhouse.org/uploads/1/3/0/4/130483487/130483487.html#excel+contingency+table+template PDF link annotation
    • http://scgroundcontrol.com/uploads/1/3/0/7/130776025/ed9ce.pdfIn PDF document text
    • http://orangecongregationalchurchnurseryschool.com/uploads/1/3/0/8/130814007/6122527.pdfIn PDF document text
    • http://drealy.com/uploads/1/3/0/6/130605388/renudivufovumu_sibon.pdfIn PDF document text
    • http://scottrosenthalphoto.com/uploads/1/3/0/8/130813645/0512ab36.pdfIn PDF document text
    • http://hatchofficial.com/uploads/1/3/0/4/130490602/2a61c9ee643.pdfIn PDF document text
    • http://salestransformationnetwork.net/uploads/1/3/1/6/131637224/bixenafogemidono.pdfIn PDF document text
    • http://aacteacher.com/uploads/1/3/0/4/130483895/ddebbdef0904.pdfIn PDF document text
    • http://downeydetailing.com/uploads/1/3/0/5/130550835/pevipigasixofokupane.pdfIn PDF document text
    • http://performancemedicalsolutions.com/uploads/1/3/0/5/130588805/7890340.pdfIn PDF document text
    • http://readingandspellingtutor.com/uploads/1/3/0/4/130478975/c4f198d.pdfIn PDF document text
    • http://jlconsultoriadf10.com/uploads/1/3/0/3/130313000/depuja_gisopitunore_zoduli_jeluwa.pdfIn PDF document text
    • http://poloantartico.com/uploads/1/3/1/3/131382387/4197417.pdfIn PDF document text
    • http://ellisfarmstn.com/uploads/1/3/0/6/130639797/nepumuko.pdfIn PDF document text
    • http://accounting.fi/uploads/1/3/0/4/130488500/tukamixo_zifutepej_sumamiviwofi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

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_off00006868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6868 10056 bytes
SHA-256: 8d64ca9e0edbf96f1687566943e99f67ce9ec83dea43569743bd39a68a7c4372

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