Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec3d6a452f391e5…

MALICIOUS

PDF

42.6 KB Created: 2020-04-18 12:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 45940fadc9e107247d6ba4291c63f38b SHA-1: e5763d8465b684fa77dd75f73c3f5fd941d0f2a1 SHA-256: 0ec3d6a452f391e534908f066aa6cdfe1324e0735eb94c99ac4fe65359640b35
96 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm or SEO spam, containing a large number of external links to other PDF files. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking behavior. While no scripts were explicitly extracted, the embedded URLs suggest a potential for distributing further malicious content or engaging in SEO manipulation tactics.

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://jackpersonaltraining.com/uploads/1/3/1/3/131383426/131383426.html#waveshare+game+hat
    • http://amigocenter.org/uploads/1/3/1/3/131379584/nuluxoj.pdf
    • http://cynthiarichardsforohio.org/uploads/1/3/0/6/130605111/vepurulenapavopiw.pdf
    • http://1stchoiceheatingcoolingllc.com/uploads/1/3/0/2/130289189/788e604428.pdf
    • http://retromaid.com/uploads/1/3/0/2/130270872/zijorize_lerix_wadiveg.pdf
    • http://naturaltolife.com/uploads/1/3/1/1/131164506/verel.pdf
    • http://hogholsters.com/uploads/1/3/0/7/130739062/fewobu.pdf
    • http://makeupbymel.org/uploads/1/3/1/6/131637257/vusalafal-bazezazole.pdf
    • http://ctirsolucoes.com/uploads/1/3/0/6/130605041/fufufulo_lidebomax.pdf
    • http://emrbookings.com/uploads/1/3/0/6/130620691/befukukoneduz.pdf
    • http://resultadoschanceloteriabaloto.com/uploads/1/3/0/5/130589348/6453193.pdf
    • http://emilysmithmd.com/uploads/1/3/0/9/130969791/lajiwam_nuwigagidemu_sagixud.pdf
    • http://drkuoeyecare.net/uploads/1/3/0/5/130588246/3539a.pdf
    • http://jagobetw.net/uploads/1/3/1/4/131406966/zerudu-refizifexudun-fajakosute-besuranewoletu.pdf
    • http://vahomebuyers.net/uploads/1/3/1/4/131438528/maliw_dukudoba_gapajugituf.pdf
    • http://kyndahlandcody.com/uploads/1/3/0/7/130776246/16f44.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://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c31.bin
db7fcc4f21eb5bc23aeef8376e3ebf05f751e15e0b3baf77fb6f925e2e4075a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C31 7872 bytes
font_01_sfnt_off00007aa0.bin
5d163b8fc3d18309dfcd804431a914bce9dd3277b7f06bfb729bc41fa2db9339
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA0 4460 bytes
font_02_sfnt_off000088de.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63
pdf-font-stream PDF embedded font (sfnt) at offset 0x88DE 16036 bytes