Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ebba0a82eb9424…

MALICIOUS

PDF

39.2 KB Created: 2020-03-27 05:14:43 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ec42ea77dfff9f5e8868947b8436e07f SHA-1: d8c6f6a6adf4e5c4e0cd8ab8add6fbd5c7be17d2 SHA-256: 49ebba0a82eb9424a06cd14956e958d834103de2cd53368c5cbb36972a0c6c60
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which appear to be part of a link farm, suggesting a Search Engine Optimization (SEO) manipulation tactic. The ML classifier strongly indicated maliciousness. The document body text is largely unreadable, but the presence of the URL 'http://sensitiveminds.org/uploads/1/3/0/2/130270980/130270980.html#icd+10+code+for+loss+of+appetite+in+pregnancy' suggests a potential lure related to medical information, which is then used to redirect to a network of other sites.

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://sensitiveminds.org/uploads/1/3/0/2/130270980/130270980.html#icd+10+code+for+loss+of+appetite+in+pregnancy
    • http://mail.lornaclansey.com/uploads/1/3/0/6/130621179/nizupapan-meluxeparewe-jeroz.pdf
    • http://mijblaxby.com/uploads/1/3/0/5/130589279/vijewesu-gavivifonineti.pdf
    • http://cncpwh.com/uploads/1/3/0/6/130603771/d66206fd.pdf
    • http://scarletcarnival.com/uploads/1/3/0/2/130289503/pufezujodif.pdf
    • http://diskyoto.jp/uploads/1/3/0/6/130620578/8568681.pdf
    • http://gb4a.com/uploads/1/3/1/1/131163751/8f616cabf540e14.pdf
    • http://mindbodypsychology.net/uploads/1/3/0/7/130776445/adce263043.pdf
    • http://social.larissamae.com/uploads/1/3/0/5/130551668/lorofopopikeb.pdf
    • http://notinbutahouseparty.com/uploads/1/3/0/3/130323630/113822.pdf
    • http://fightingordi.org/uploads/1/3/0/2/130291328/xatufo_rajunisigoburax_tifitawoledo.pdf
    • http://washingtonchoice.org/uploads/1/3/0/2/130289429/9948333.pdf
    • http://hostmaster.lula.site/uploads/1/3/0/6/130620966/9594747.pdf
    • http://missoulaimports.net/uploads/1/3/0/5/130544257/wosoregen.pdf
    • http://www.workuemailprocessing.com/uploads/1/3/0/9/130969130/292562.pdf
    • http://www.randylaubphoto.com/uploads/1/3/0/4/130488983/witevuz.pdf
    • http://tailormadeventures.com/uploads/1/3/0/5/130588731/eee296.pdf
    • http://www.michaelfilipelli.com/uploads/1/3/0/6/130621601/2517448.pdf
    • http://equivesthq.com/uploads/1/3/0/7/130740175/garurawiro.pdf
    • http://makingwhoopiepie.com/uploads/1/3/0/7/130775934/c3053efe9c4e3.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_off000071a7.bin
16c7cc4c722f01b4ebbb76ff81ea9d6db1455ac3df2e84ee8255da8c215c45c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A7 7564 bytes

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