Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e8e7f9df0a5e2f…

MALICIOUS

PDF

39.1 KB Created: 2020-06-13 04:20:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdecc3f8da391cf648403c23c980d09b SHA-1: 42462f9d85b4a588c0968d716aaecaa881021eb7 SHA-256: 08e8e7f9df0a5e2f0be0348e3cbcd30846d418a3195c4e7659222c99c033ee96
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a malicious intent to redirect users. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of numerous suspicious URLs points towards a phishing or malware distribution campaign.

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://mail.fatherjim.com/uploads/1/3/0/8/130874629/130874629.html#http%253A%252F%252Flra.org%252Fuploads%252F1%252F2%252F9%252F4%252F129455080%252F129455080.html%253Fvintage+coleman+catalytic+heater
    • http://ezrajackkeatsprekcenters.com/uploads/1/3/0/5/130590158/2db737fd2.pdf
    • http://2b3.undesirable.us/uploads/1/3/1/1/131164173/380c9e420c.pdf
    • http://unifittsproperties.com/uploads/1/3/0/6/130639747/c5ba598f.pdf
    • http://hostmaster.schoorlemmer.de/uploads/1/3/0/7/130739706/wabesotunikexol-vokobuf-jonuta.pdf
    • http://libertysparksltd.com/uploads/1/3/0/9/130969346/nikota-fakivuwisa.pdf
    • http://citadelair.com.au/uploads/1/3/1/4/131408100/758a37b4a78883.pdf
    • http://sanamthakur.com/uploads/1/3/1/8/131871499/tudebevadat.pdf
    • http://parkerdancecompany.net/uploads/1/3/0/7/130739287/d85d856d83b31a9.pdf
    • http://admin.hwupenyuproject.org/uploads/1/3/0/6/130639784/paxapuselipegi.pdf
    • http://mta-sts.mx.drantoniochendds.com/uploads/1/3/1/6/131606550/31b951f.pdf
    • http://anthologycollection.com/uploads/1/3/0/6/130620538/zalawuzav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://bijetukexer.files.wordpress.com/2020/06/53301725423.pdf
    • https://jopemajo750557882.files.wordpress.com/2020/06/16315885558.pdf
    • https://wubolijog.files.wordpress.com/2020/06/titurel.pdf
    • https://fobitogoxonu.files.wordpress.com/2020/06/koxabutetezavexujajifir.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_off00006c78.bin
3882c52f31df35b4463c9589c8b0c7955edf33cc2b186e3c4cd7d302e84c44ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C78 10164 bytes

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