Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69b80e51f1173ab…

MALICIOUS

PDF

37.8 KB Created: 2020-04-12 17:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 07b603e2984c0554e9d8319358535116 SHA-1: 332e68ec1a560b0aa40a2f6cc6c05e7e80e1ff96 SHA-256: c69b80e51f1173ab39e78928b66fa8c74f07cef10c840828dca1948b4bbc4a67
94 Risk Score

Malware Insights

MITRE ATT&CK
T1598 External Remote Services T1204 User Execution

The PDF file contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a mechanism to distribute malicious content indirectly. The ML classifier strongly flagged this PDF as malicious, supporting the suspicious nature of the embedded URLs. No scripts were extracted from this sample.

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://thrivetobehealthy.com/uploads/1/3/0/5/130542822/130542822.html#tipos+de+investigacion+experimentales
    • http://thestoryandbodyproject.org/uploads/1/3/0/5/130588663/vekojasivi-kuzulekup-gufujenomejiwef-xurama.pdf
    • http://samemler.com/uploads/1/3/0/2/130287428/kedeko_zemonogun_famukujiwawexe.pdf
    • http://eswirdeinmal.com/uploads/1/3/0/2/130274315/gabomigozuxad.pdf
    • http://ballparkbeads.com/uploads/1/3/0/7/130738716/gimolizawukupob_bupive.pdf
    • http://justgis.org/uploads/1/3/0/8/130814338/252789.pdf
    • http://healing-arts-miami.com/uploads/1/3/1/4/131406811/lasaguzuwuvo.pdf
    • http://missiondestiny.net/uploads/1/3/0/4/130435592/38ff758a48.pdf
    • http://uaeinsurancepolicy.com/uploads/1/3/0/4/130483565/lozubamubago_suvul_jowawafijolexef_rixopo.pdf
    • http://whitlockintl.com/uploads/1/3/1/3/131384291/pigulalelugitap.pdf
    • http://kidlymestory.com/uploads/1/3/0/8/130814960/fivezajetoxebef.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006aab.bin
8844a744b0b3592fa6a86ca4a7082f8a48dfb7ac58c439a5587c4db55e9f6332		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAB 8432 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.