Malicious PDF — malware analysis report

Static analysis result for SHA-256 52149013f8c22553…

MALICIOUS

PDF

68.7 KB Created: 2020-03-27 06:32:20 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1a2d4605e82f987c4e69f02b3bca1db0 SHA-1: a4b03652519152732cbb0cc18df14aa645c48ac8 SHA-256: 52149013f8c22553b9a232974dba27fb5b922b6ad93a324e86040737a7fcc03c
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The primary link directs to a page with 'password list' in the URL, suggesting a phishing or credential harvesting attempt. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the link farm structure is indicative of a malicious distribution or redirection scheme.

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://youbrewchicago.com/uploads/1/3/1/1/131163853/131163853.html#yu+gi+oh+forbidden+memories+2+password+list
    • http://allamericanoverheaddoors.com/uploads/1/3/0/3/130323445/bazujapimox.pdf
    • http://dapcploxy.org/uploads/1/3/0/4/130476539/8907641.pdf
    • http://charlottesvillemusic.org/uploads/1/3/0/8/130813533/512566220c.pdf
    • http://howgills.net/uploads/1/3/0/7/130738918/guluxijom_lujig_kiwenepedaropet_xelozo.pdf
    • http://michellecmcadams.com/uploads/1/3/0/7/130776693/wotamaxi.pdf
    • http://www.getidialogue.com/uploads/1/3/0/8/130874413/vitoludapigeb.pdf
    • http://bestbridalpricesri.com/uploads/1/3/0/6/130620213/9c787e428.pdf
    • http://sandboxlogin.com/uploads/1/3/0/4/130476412/vonatonoroxotun.pdf
    • http://www.veganchefinfrance.com/uploads/1/3/0/9/130969235/xoxolebabato.pdf
    • http://color-paper.com/uploads/1/3/0/5/130539492/jowazexudegubano.pdf
    • http://communitiesfordemocracy.com/uploads/1/3/0/5/130551270/wifulegaz.pdf
    • http://dulcescriollos.org/uploads/1/3/0/8/130813798/9978339.pdf
    • http://tawuintibaku.com/uploads/1/3/0/8/130874134/4140266.pdf
    • http://lginternationaluniversity.com/uploads/1/3/0/3/130323115/dc83d4f42e53e.pdf
    • http://patrickreedsclass.com/uploads/1/3/0/6/130620633/liriwuwepedet.pdf
    • http://spjosephlyons.com/uploads/1/3/0/7/130776409/5696589.pdf
    • http://investtorent.net/uploads/1/3/0/7/130776105/344355.pdf
    • http://webdisk.campkenosee.net/uploads/1/3/0/4/130483592/2939569.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_off0000dbcb.bin
cc7d91eb4fa970cc39f30bdb13171bce061407674b4c6b061601871e3b0278ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCB 7956 bytes
font_01_sfnt_off0000fad6.bin
4d9ec2aec8f1ca6bebe1b56492fd55a77bba3a6e98efb76508c1b835d4eb9912		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD6 2860 bytes

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