Malicious PDF — malware analysis report

Static analysis result for SHA-256 df0f0b870a16d9e7…

MALICIOUS

PDF

49.5 KB Created: 2020-03-23 15:39:13 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e70828b2bcae1e28be070241fb4d249e SHA-1: dfaa07323ed13c839da4192c9e63b744ff165702 SHA-256: df0f0b870a16d9e7c9a733bb49932427a2c8c8c33c91e0af394135eb66a56824
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files on different domains. This behavior is indicative of a link farm designed to manipulate search engine results or distribute malicious content. The primary heuristic 'PDF_SEO_LINK_FARM' strongly suggests this malicious intent. No scripts were extracted, and the document body is largely unreadable binary data, but the embedded URLs are the key indicators of the attack pattern.

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://gregjiel.com/uploads/1/3/0/6/130621060/130621060.html#energia+cinetica+ejemplos+pdf
    • http://renosoul.info/uploads/1/3/0/5/130543035/c23d7bfb0.pdf
    • http://members.aaoc.com/uploads/1/3/0/3/130379294/tovepubifurikid-jinebemogiz-gijuwutoxakezor-mivedobomobasob.pdf
    • http://049pledge.com/uploads/1/3/0/8/130815726/6ecf19d0.pdf
    • http://avispire.co.uk/uploads/1/3/0/7/130738929/232171.pdf
    • http://hardwasteremoval.com/uploads/1/3/0/6/130621051/wuwexiposipipe.pdf
    • http://thehappiestbuildinginoakland.com/uploads/1/3/0/5/130542736/6405641.pdf
    • http://weddingconcierge.pennyandmary.com/uploads/1/3/0/8/130874370/77b82cf23c276dc.pdf
    • http://hypotheek-bv.nl/uploads/1/3/0/7/130775598/3205664ca9e5ad6.pdf
    • http://www.raggzbodyboutique.com/uploads/1/3/0/5/130589238/9884196.pdf
    • http://pamelacowan.com/uploads/1/3/0/7/130775610/lilub.pdf
    • http://www.islandcool.org/uploads/1/3/0/9/130969980/3635898.pdf
    • http://dmbmissionaryresources.org/uploads/1/3/0/7/130739502/ruxapogatanazi-zizufiz.pdf
    • http://autodiscover.figlearningcentre.com/uploads/1/3/0/2/130287837/14633.pdf
    • http://the-givingtree.com/uploads/1/3/0/5/130539440/d35c49fc2b5.pdf
    • http://www.synodcanada.com/uploads/1/3/0/7/130739662/af3a31.pdf
    • http://mgeducationfund.org/uploads/1/3/0/6/130620267/xofeket_begijimugupilo.pdf
    • http://tiffodbold.dk/uploads/1/3/0/5/130551639/4433721.pdf
    • http://tradingblockpro.com/uploads/1/3/0/4/130488544/potatoka.pdf
    • http://www.amaceying.com/uploads/1/3/0/6/130621664/bb32436483.pdf
    • http://visitcaddogap.org/uploads/1/3/0/8/130814407/lowumuzevawepe-fipilefogapow.pdf
    • http://gslpgtroop147.com/uploads/1/3/0/4/130435927/xamefasun_zexikulexiwaf_rujazile.pdf
    • http://rmtdesigngroup.com/uploads/1/3/0/4/130491075/fulukerelerig-faxojiwofewifa-ruxavekaxov.pdf
    • http://mail.hathawayfarms.com/uploads/1/3/0/3/130379146/8765149f7b66036.pdf
    • http://primebusinesschecks.com/uploads/1/3/0/6/130621119/bikogezirasilo_fafiko.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_off000089bb.bin
b03e388b70b668c49cb8ab2e6a5519b89669cc75516fcf50a0ef94860b2a9ab7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89BB 8876 bytes
font_01_sfnt_off0000a998.bin
6c3932547eb501ede8f39431e9eb862c2247c38f1828624714dc6c64e63af8c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA998 3600 bytes

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