Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6efd511b2a02a68…

MALICIOUS

PDF

46.1 KB Created: 2020-04-05 09:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e29e4a530730eac5fd37b0809c4f4d29 SHA-1: 6ec9796f3ea18869c1ddcdfe2284991830f2ba4d SHA-256: a6efd511b2a02a68dea63c7cb4155f6627d33af3d28c36c8ca871e107763013c
96 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external URLs. The heuristic PDF_SEO_LINK_FARM indicates a high volume of links, suggesting an attempt to manipulate search engine results or redirect users to potentially malicious content. No scripts were extracted from this sample, but the sheer number of outbound links points to a delivery or redirection mechanism.

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://arcadiagardensllclandscapinganddesign.com/uploads/1/3/0/7/130775016/130775016.html#strongholds+
    • http://wymanwinbush.com/uploads/1/3/1/4/131438775/fijufuteseve_delugajatuf_bogud_zumaxurewis.pdf
    • http://reesedesigns.net/uploads/1/3/0/4/130476277/wudexetomanupem.pdf
    • http://rainerhaycraft.com/uploads/1/3/0/4/130477018/7092641.pdf
    • http://soulfulspring.com/uploads/1/3/1/0/131071231/7862363.pdf
    • http://manuelaferretti.ch/uploads/1/3/1/4/131438329/c573dd.pdf
    • http://irvincarsten.com/uploads/1/3/0/5/130590154/bovoto-mitamuf-vogigex-gebizutadukega.pdf
    • http://puppiesandpastries.com/uploads/1/3/0/7/130776582/2109539.pdf
    • http://gabrielmobolaji.com/uploads/1/3/0/7/130775520/dc0438d0d6a753.pdf
    • http://episcopalofsc.org/uploads/1/3/0/2/130272482/3bcb0.pdf
    • http://miryammonasterios.com/uploads/1/3/0/5/130539637/luligosotibidisa.pdf
    • http://kinghillfarmabwp.com/uploads/1/3/0/6/130640040/9d8abede5ef8d.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007518.bin
6c5448f7ad2c4db2388846894a2487e1443d4dac87195a036277475461583f6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7518 8608 bytes
font_01_sfnt_off000095d2.bin
046bf66fa26bc76e5856b45adb6ab996d2bb4abfb8656006bcb8a1c38357fd6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95D2 16228 bytes

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