Malicious PDF — malware analysis report

Static analysis result for SHA-256 06f2c7011f7fb68b…

MALICIOUS

PDF

35.7 KB Created: 2020-06-05 01:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75adc1faf0b1e41f65d3716f74e43011 SHA-1: 70a17d603a3762d971b4a73216d9ae5437e9a4d2 SHA-256: 06f2c7011f7fb68bfd58fe52590e2ed55f390de95cd20c27e7efc2a3ff669d03
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The embedded document body text, though heavily obfuscated, contains references to URLs that are also listed in the extracted URLs. The ML classifier strongly suggests maliciousness. The primary attack pattern appears to be a link farm or SEO manipulation, potentially leading to further malicious content or phishing pages.

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://ramintaksipalvelu.fi/uploads/1/3/1/1/131163736/131163736.html#before+you+say+i+do+book+pdf
    • http://willandwolfie.info/uploads/1/3/1/6/131637635/3e2901c97f.pdf
    • http://onlinefinancieeldossier.nl/uploads/1/3/0/8/130874201/basozepidiv.pdf
    • http://thoughtcoalitionhq.com/uploads/1/3/1/4/131405976/7676795.pdf
    • http://mamalovesadventure.com/uploads/1/3/0/5/130588601/witedasewatog.pdf
    • http://violintulsa.com/uploads/1/3/1/4/131454771/famikepetedalab-gixinukebefot-tixutowu.pdf
    • http://amandarachelleart.com/uploads/1/3/0/5/130588405/8272740.pdf
    • http://ramintaksipalvelu.fi/uploads/1/3/1/1/131163736/terms.html
    • http://ramintaksipalvelu.fi/uploads/1/3/1/1/131163736/dmca.html
    • http://ramintaksipalvelu.fi/uploads/1/3/1/1/131163736/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://magelibagub.files.wordpress.com/2020/06/44201110452.pdf
    • https://vikemimi836926263.files.wordpress.com/2020/06/ligojub.pdf
    • https://mafowuz351854288.files.wordpress.com/2020/06/33180766998.pdf
    • https://budotavimomo.files.wordpress.com/2020/06/xiranaji.pdf
    • https://xukojiruxe.files.wordpress.com/2020/06/58577762782.pdf
    • https://nososakuzeku.files.wordpress.com/2020/06/5470394193.pdf
    • https://gatudexopet.files.wordpress.com/2020/06/tajoberiberika.pdf
    • https://moraxokeka.files.wordpress.com/2020/06/refiser.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006124.bin
333d9d0076cdbc6409e033f22140f4c9b2e18d7fcf0203830a969180a21e9469
pdf-font-stream PDF embedded font (sfnt) at offset 0x6124 10000 bytes