Malicious PDF — malware analysis report

Static analysis result for SHA-256 d756923321a631b0…

MALICIOUS

PDF

42.3 KB Created: 2020-03-29 08:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 6000009fb94fd2e44329dcb655c8835a SHA-1: 6b77597f5cbe325eeb772c46ad1a2b1c320c0b7e SHA-256: d756923321a631b0d8e13a058565afab4d5975910eab08431067b8a9900a7456
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm or a redirection scheme designed to obscure the ultimate destination or to distribute malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this pattern, suggesting a malicious intent to drive traffic or distribute further payloads through these links.

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://moodlabnewlife.nl/uploads/1/3/0/7/130775990/130775990.html#nociones+de+geometria+analitica+y+algebra+lineal+kozak+pdf PDF link annotation
    • http://chasingalovesupreme.com/uploads/1/3/0/3/130379336/sejorewux_xodajonise.pdfIn PDF document text
    • http://realsignaturestyle.com/uploads/1/3/0/7/130740498/4c7ea51d0.pdfIn PDF document text
    • http://mail.jlorennorris.com/uploads/1/3/1/4/131410158/1337547.pdfIn PDF document text
    • http://sceneguide.net/uploads/1/3/0/3/130379894/9949659.pdfIn PDF document text
    • http://colleenjoanjohnson.com/uploads/1/3/0/4/130475881/e5ad3df84c.pdfIn PDF document text
    • http://toyota-tacoma-v6.com/uploads/1/3/0/9/130969563/f8e5367d1e85.pdfIn PDF document text
    • http://serprollc.com/uploads/1/3/0/3/130313005/759dc4507.pdfIn PDF document text
    • http://theworldunplugged.org/uploads/1/3/0/7/130740385/bopew-famoxunikekew-jobutojobofugiz.pdfIn PDF document text
    • http://steedscottlaw.com/uploads/1/3/0/4/130435639/7bff4b7e6c10e69.pdfIn PDF document text
    • http://openradio.es/uploads/1/3/0/6/130640162/7d850d7.pdfIn PDF document text
    • http://www.theyshouldhavebeennice.com/uploads/1/3/0/4/130436441/0232321521324.pdfIn PDF document text
    • http://skoutsecurity.us/uploads/1/3/0/2/130288392/2585763.pdfIn PDF document text
    • http://deloresaireydesigns.com/uploads/1/3/0/6/130639082/9478765.pdfIn PDF document text
    • http://amwaybyfiliz.com/uploads/1/3/0/2/130272319/62c52bd06ebfe7b.pdfIn PDF document text
    • http://alejandroariza.info/uploads/1/3/0/2/130271243/wapija.pdfIn PDF document text
    • http://yujinyulechengzenmeying.f18.ebkf.org/uploads/1/3/1/1/131164456/3392259.pdfIn PDF document text
    • http://alistent.com/uploads/1/3/0/8/130874258/pinokonigopofa.pdfIn PDF document text
    • http://stayfitbedskirt.com/uploads/1/3/0/6/130621789/geremepoke_nixokatepimiwu_suzibebe_pedoze.pdfIn PDF document text
    • http://karmatechnic.com/uploads/1/3/0/3/130379101/xufuwasob.pdfIn PDF document text
    • http://bluebirdconcreteliftingandrepair.com/uploads/1/3/0/6/130604877/muped.pdfIn PDF document text
    • http://movinion.com/uploads/1/3/0/3/130379135/laxetadatilore.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 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_off00007868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7868 9024 bytes
SHA-256: 26bc7addbc357051f1731dac5b2937c2ed713e1cc3f825e00000cdf919ac1e83

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