Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b44751e57a1134…

MALICIOUS

PDF

44.9 KB Created: 2020-03-21 02:50:22 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 26e57009f03474d44c84b36e07221751 SHA-1: dc7d3906f094c47364204ffbefe0a74efe9b3113 SHA-256: d6b44751e57a11341dcb89f8efde3bd193553b6c44b8a8b5d0c303220ab30fa3
96 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text related to 'Super smash bros flash 2 unblocked games 76' and references wkhtmltopdf, suggesting a lure or content delivery mechanism. The primary intent appears to be directing users to a network of suspicious domains, likely for SEO manipulation or to serve further malicious 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://jewels-hair-studio.com/uploads/1/3/0/2/130287988/130287988.html#super+smash+bros+flash+2+unblocked+games+76
    • http://ordrealestate.com/uploads/1/3/0/8/130814669/kikefumo_fepatuwaj.pdf
    • http://permezone.com/uploads/1/3/0/2/130289466/4822222.pdf
    • http://maya-lightupyourlife.com/uploads/1/3/0/9/130969270/dunugewigabutopal.pdf
    • http://rayraybeats.com/uploads/1/3/0/4/130476412/bujuz.pdf
    • http://laurfree.com/uploads/1/3/1/1/131163717/6907458.pdf
    • http://www.fryersfruitsoda.co.uk/uploads/1/3/0/7/130738534/riwomixugigadow-vipepiripale-ramur-vurilele.pdf
    • http://hogs.farm/uploads/1/3/0/8/130814225/ruzapiwe.pdf
    • http://computechyearbook.com/uploads/1/3/0/2/130288448/fagama.pdf
    • http://melas.store/uploads/1/3/0/6/130605521/f192a81418ce2.pdf
    • http://addylou.net/uploads/1/3/0/2/130291544/rogirikemagaf.pdf
    • http://trexcel.com/uploads/1/3/0/7/130740065/6dc9886f9dba213.pdf
    • http://www.bettering-me.com/uploads/1/3/0/8/130873843/b4e57efd3.pdf
    • http://lingua360.org/uploads/1/3/0/5/130588240/54184.pdf
    • http://bedouin.tv/uploads/1/3/0/4/130483566/2684971.pdf
    • http://auweneyck.net/uploads/1/3/0/2/130288682/lireped-bolonodesuw-dakax-sexatajarep.pdf
    • http://beeidentification.com/uploads/1/3/0/6/130604176/ketowofet_befozotetewuwuk.pdf
    • http://mhfacilities.com/uploads/1/3/0/7/130738943/zuworopu-bivoboraru-filobo.pdf
    • http://mrsbeesdaycare.com/uploads/1/3/0/5/130590594/xodugisajo-jelumixizer-disudokojefuf.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_off00007df5.bin
c30c14dd9efaf5caf9dad725b17f87a9edccca70b775812a2dcf9a176beec712
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF5 8056 bytes
font_01_sfnt_off00009d2a.bin
83459e82cebe561b9e65dda6a09953c9e35f75e5df0fa62a624e1833cc5b8086
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D2A 1708 bytes