Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e77f7e219d6ffe…

MALICIOUS

PDF

48.7 KB Created: 2020-04-01 18:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5ad3693d88dfd8f136f686a6b1ed0c8a SHA-1: fdcebaab1244fa1d297208663a8fc7c4b59ad5b0 SHA-256: 75e77f7e219d6ffed94a17b511289bae2cbda511f0e654d4740a832fe8a49975
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body itself contains obfuscated text and references to URLs, suggesting an attempt to manipulate search engine results or redirect users to malicious content hosted on these domains. No scripts were extracted, but the sheer volume of links points to a link-farming 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://stayweirdstitches.com/uploads/1/3/0/2/130288421/130288421.html#cuento+el+raton+el+leon+y+la+espina
    • http://ecokick.net/uploads/1/3/0/2/130272577/jasenimisa.pdf
    • http://salukigymnastics.com/uploads/1/3/0/7/130739182/vukonelupe.pdf
    • http://bountyofgaia.com/uploads/1/3/0/6/130639351/1847802.pdf
    • http://bgreenglobalconsulting.com/uploads/1/3/1/3/131380183/29894ce0a183905.pdf
    • http://quasi-millennial.com/uploads/1/3/0/7/130775278/8195300.pdf
    • http://creaturesandotheroddities.com/uploads/1/3/0/9/130969440/tezumarobe.pdf
    • http://chezswann.com/uploads/1/3/0/5/130541384/dee15a091cbaa97.pdf
    • http://thevelvetteddy.com/uploads/1/3/1/4/131438305/ec0cac3.pdf
    • http://thinkgrandfilms.com/uploads/1/3/0/5/130544091/bd9346.pdf
    • http://chairsleeve.org/uploads/1/3/0/6/130639412/tigolev.pdf
    • http://bespokeinkent.com/uploads/1/3/0/6/130621730/dupal.pdf
    • http://infinitelandscaping.net/uploads/1/3/0/7/130775432/kidenu.pdf
    • http://lincolncountyculturalcoalition.org/uploads/1/3/0/5/130588803/ginov.pdf
    • http://whatclothingla.com/uploads/1/3/0/5/130541661/mijit.pdf
    • http://beebrave.pink/uploads/1/3/0/7/130740259/woguzovid.pdf
    • http://proffitability.com/uploads/1/3/0/7/130775701/nalen_jinij_jowawanux.pdf
    • http://georgeandshelly.com/uploads/1/3/1/3/131381804/5411219.pdf
    • http://coopersdieselsolutions.com/uploads/1/3/0/5/130588813/7273477.pdf
    • http://mangabackarsma.com/uploads/1/3/0/2/130271097/wemuv-desinolugilu-vogunimulogit-wukad.pdf
    • http://webdisk.dynamicwealth.ca/uploads/1/3/0/8/130874007/1063475.pdf
    • http://legendaryelitemg.com/uploads/1/3/0/5/130588550/1244578.pdf
    • http://mtperrymechanicsptyltd.com/uploads/1/3/1/1/131164266/kafegamigusene.pdf
    • http://hunterlegacy.org/uploads/1/3/1/4/131406841/supexenun.pdf
    • http://animalloverscaninerescue.com/uploads/1/3/0/2/130288534/6907808.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://www.adobe.com/).Noto
    • http://www.google.com/get/noto/http://www.adobe.com/type/This
    • http://scripts.sil.org/OFLNoto

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000084ab.bin
297424944e3726b12fc6e02b1e45ac1b49c043df52600a089ffab1c205bc96ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84AB 9300 bytes
font_01_sfnt_off0000a5ba.bin
885781ec91db75dc8c4a6a3d3dac0324bdfdb8f2239dab70466c62035ae072da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5BA 4144 bytes

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