Malicious PDF — malware analysis report

Static analysis result for SHA-256 036759c72f3b20b2…

MALICIOUS

PDF

37.2 KB Created: 2020-04-10 05:36:20 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8fe95836703dcf55d05940ff4550c193 SHA-1: 4176b36236ba2f66f0d76eab1d2bb625bbc72be4 SHA-256: 036759c72f3b20b2ac4718414d8b9532ff94d0d0eb9b2f3ee62de201d695e845
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier and contains a large number of external links. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm or content distribution network. The primary URL found in the document body, http://clickinteriordesign.net/uploads/1/3/0/4/130476699/130476699.html#elder+sign+unseen+forces+rules, along with many others, points to a coordinated effort to redirect users to potentially harmful content.

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://clickinteriordesign.net/uploads/1/3/0/4/130476699/130476699.html#elder+sign+unseen+forces+rules
    • http://whidbeyrippleeffect.com/uploads/1/3/1/4/131437313/wobebebawogejowonuru.pdf
    • http://day2dayessentials.com/uploads/1/3/0/7/130775927/9796602.pdf
    • http://austenhohendorf.com/uploads/1/3/0/4/130483871/5619077.pdf
    • http://margaretwhitten.com/uploads/1/3/0/5/130551630/julakukubi.pdf
    • http://venturetoheal.org/uploads/1/3/1/4/131409035/6435460.pdf
    • http://spectruminternetradio.com/uploads/1/3/0/7/130775588/0e0d2ca9b.pdf
    • http://wyndfieldbrantford.com/uploads/1/3/1/4/131409909/lomomefipas.pdf
    • http://erikgianni.com/uploads/1/3/0/3/130323148/tevivilazekoza.pdf
    • http://alexishoffmanclassroom.com/uploads/1/3/1/4/131438848/990ab8717.pdf
    • http://justdiehappy.com/uploads/1/3/0/8/130814189/kebigezu.pdf
    • http://kicksonclocks.com/uploads/1/3/0/5/130588482/jixinomene.pdf
    • http://wanderingalchemistjuiceco.com/uploads/1/3/1/3/131380021/7853553.pdf
    • http://bodybalancebeyond.com/uploads/1/3/0/5/130546717/pusiwatanoxebololur.pdf
    • http://puchasurfclub.com/uploads/1/3/0/4/130435741/bituzot.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_off00006958.bin
addedf3cd9fed42f59d68b380c2bb071e2a0b43337d179e91b230df9b0301bbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6958 7324 bytes

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