Malicious PDF — malware analysis report

Static analysis result for SHA-256 90bec2f3f80bda48…

MALICIOUS

PDF

40.1 KB Created: 2020-03-20 09:55:00 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 4d10ca40c115788c35faffbcca9c5485 SHA-1: e312bb3e9f409b9b640d8aa1cd943b0b353d04bf SHA-256: 90bec2f3f80bda4823c6636cac58ba76cd47ed99b2585c95114a810af69c27cb
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files with numeric or generic slugs. This pattern is indicative of a link farm or SEO manipulation tactic. The primary URL found in the document body also follows this pattern. No scripts were extracted, and the document body content is largely obfuscated, making it difficult to determine a more specific malicious intent beyond link distribution.

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://stemvets.org/uploads/1/3/0/9/130969904/130969904.html#como+se+registra+la+perdida+del+ejercicio+en+el+balance+general PDF link annotation
    • http://michelletrappen.com/uploads/1/3/0/7/130775939/dajeladobi.pdfIn PDF document text
    • http://easycamconnect.com/uploads/1/3/0/5/130589454/8838229.pdfIn PDF document text
    • http://artthouholy.com/uploads/1/3/0/7/130738996/cd7b184ef519fde.pdfIn PDF document text
    • http://stunningsphynxkitten.com/uploads/1/3/0/6/130604789/gerebodozuguno.pdfIn PDF document text
    • http://hopefulkc.com/uploads/1/3/0/7/130776525/3462504.pdfIn PDF document text
    • http://treepro.net/uploads/1/3/0/9/130969391/surakabemajivekap.pdfIn PDF document text
    • http://news.enigmahealth.com/uploads/1/3/0/6/130639797/5275696.pdfIn PDF document text
    • http://californiaspac.com/uploads/1/3/0/5/130551058/gurig_xubufab_duvuna_mimodoz.pdfIn PDF document text
    • http://bespokeoff-road.com/uploads/1/3/0/6/130620293/6504182.pdfIn PDF document text
    • http://fr.jiaxinti-store.com/uploads/1/3/0/5/130588757/7100428.pdfIn PDF document text
    • http://webdisk.travelbymisty.com/uploads/1/3/0/2/130291658/1281635.pdfIn PDF document text
    • http://bodikerconsulting.com/uploads/1/3/0/5/130545199/94ba34b.pdfIn PDF document text
    • http://mindbodystorypodcast.com/uploads/1/3/0/3/130313186/7928985.pdfIn PDF document text
    • http://beachsoccerunited.com/uploads/1/3/0/2/130287407/7562206.pdfIn PDF document text
    • http://portcityappliancerepair.com/uploads/1/3/0/6/130621622/d0276abd5.pdfIn PDF document text
    • http://www.musebeatmedia.com/uploads/1/3/0/9/130969946/31bce96c148e2b0.pdfIn PDF document text
    • http://ayudandoteacrecer.com/uploads/1/3/0/6/130640033/1469726.pdfIn PDF document text
    • http://netvisionaries.com/uploads/1/3/0/2/130287371/bc2372120.pdfIn PDF document text
    • http://kaos-box.com/uploads/1/3/0/7/130740175/mitipametenikavezu.pdfIn PDF document text
    • http://toldmy.com/uploads/1/3/0/8/130814083/6eafc53bcf54e0.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_off00007043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7043 8876 bytes
SHA-256: 6c517c68c94de4c7e53f57e5ad0e6a0ba4f21f0882461e48190d86701340fa18

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