Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e5570a3d3fc964…

MALICIOUS

PDF

42.7 KB Created: 2020-03-29 12:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: b21853cf15d15b97e0663c08af04515c SHA-1: 04340e671a47d150f9a0f5a4600f016e58ebe200 SHA-256: 36e5570a3d3fc964bf1a1808692390864395a2738bb4d35f2ee4df01e860f575
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on unrelated domains. This pattern is indicative of SEO poisoning or a link farm designed to distribute malicious content or drive traffic. The ML classifier strongly flagged this PDF as malicious, supporting this assessment. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://rochecenter.org/uploads/1/3/0/7/130774969/130774969.html#character+names+in+jungle+book+movie+2016 PDF link annotation
    • http://brendanbeame.com/uploads/1/3/0/3/130323599/5495678.pdfIn PDF document text
    • http://robcofreedomcelebration.org/uploads/1/3/0/6/130604371/496987.pdfIn PDF document text
    • http://lovelocsstyling.com/uploads/1/3/1/1/131163684/49babdb897.pdfIn PDF document text
    • http://andrewmckelvey.com/uploads/1/3/0/6/130639958/sikexodegide-napasudasadiwaj-kalefa-sevok.pdfIn PDF document text
    • http://myescondidosoccer.com/uploads/1/3/0/6/130621458/7012521.pdfIn PDF document text
    • http://loripeppin.com/uploads/1/3/0/6/130621413/futovida-bibopawamase-suvadumozo-jafunadikugol.pdfIn PDF document text
    • http://blainesbodyart.com/uploads/1/3/0/6/130605212/livexoxaxito_lajob_goravaku_dosozobomewoko.pdfIn PDF document text
    • http://850igator4x4.com/uploads/1/3/0/3/130323527/222359624f0.pdfIn PDF document text
    • http://arielleschiano.com/uploads/1/3/0/6/130604558/227218.pdfIn PDF document text
    • http://clinicadentalcovadonga.com/uploads/1/3/0/7/130740480/kipulop.pdfIn PDF document text
    • http://sabalegalservices.com/uploads/1/3/0/7/130775062/b4128b16.pdfIn PDF document text
    • http://camidogtraining.com/uploads/1/3/0/2/130270892/25b736.pdfIn PDF document text
    • http://rimlkidz.net/uploads/1/3/1/3/131379202/6567325.pdfIn PDF document text
    • http://elitemineralsinc.com/uploads/1/3/0/7/130775441/xaxijojekisak.pdfIn PDF document text
    • http://sevenpointle.com/uploads/1/3/1/3/131379085/4604542.pdfIn PDF document text
    • http://wecarecleaning.org/uploads/1/3/0/3/130323417/5564505.pdfIn PDF document text
    • http://teamempoweringtogether.com/uploads/1/3/0/5/130551211/rugumuz-fekonuwusoged.pdfIn PDF document text
    • http://kronoscomics.net/uploads/1/3/0/4/130483617/0338c.pdfIn PDF document text
    • http://chrisalbrightconsulting.com/uploads/1/3/0/7/130740222/218595.pdfIn PDF document text
    • http://mansester.com/uploads/1/3/0/7/130740466/8493989.pdfIn PDF document text
    • http://givevolunteers.org/uploads/1/3/0/8/130874232/5614243.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_off00007cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAD 7924 bytes
SHA-256: 22a166973b18b02101b7d72a8dbeb4c03e2ed1cd7023038be8664ba0c63cd86f

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