Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d23b2763bd6f132…

MALICIOUS

PDF

63.1 KB Created: 2020-04-18 00:51:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c55b2bae237490da590b738ef0046e3e SHA-1: 28ea814da8e0c097a5e5070048783d83180d14e6 SHA-256: 5d23b2763bd6f1329f3d054dce8d2d6b5327b2bf02b624408e2b428a1f6588d5
96 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a 'PDF_SEO_LINK_FARM', indicating a large number of external links. The embedded document body also contains a URL pointing to a collection of PDFs. This suggests the primary purpose is to redirect users to a network of linked documents, likely for SEO manipulation or to serve as a distribution point for further malicious content. No scripts were extracted, but the structure implies a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://nabena.com/uploads/1/3/0/2/130288883/130288883.html#bleacher+report+epl+predictions+week+24
    • http://firematicfireandsafety.com/uploads/1/3/1/4/131452839/muxapetolof.pdf
    • http://newbreedzgenerationz.com/uploads/1/3/0/2/130289409/munezarupilevixiviw.pdf
    • http://tcuroxo.com/uploads/1/3/0/4/130435588/6e18a4.pdf
    • http://bonjourmktg.com/uploads/1/3/0/6/130620529/turikabodaf.pdf
    • http://somewhere2turn.com/uploads/1/3/0/7/130776587/mekilumutexef.pdf
    • http://thistlesandthorns.net/uploads/1/3/0/2/130289410/xesuno.pdf
    • http://fromfarmandforest.com/uploads/1/3/0/4/130478470/lokanavujejufatuwi.pdf
    • http://livebetter-livehealthy.com/uploads/1/3/0/9/130969972/rumore_bamigajibek.pdf
    • http://movingthroughboundaries.com/uploads/1/3/1/4/131406281/nijelijo.pdf
    • https://t.Tuesday
    • https://t.m.co/fJzpAtreOQAgainst
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000091f9.bin
d1ab0ba68b2b14fb704d37459be07b3c2e64a4b4db40782d11f579abe216d652		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91F9 9456 bytes
font_01_sfnt_off0000b53b.bin
e9a0f6df8889d3ded4f387df96b03817592447eda4ca74a6a7c43e7fce99310c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB53B 4516 bytes
font_02_sfnt_off0000c3a5.bin
6f13902c56231375baabd7d7a9d552d75f195749e16f985683da6610eceab72e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A5 2856 bytes
font_03_sfnt_off0000cd9a.bin
e2565d3055a991465e1669e4d43f23ae90b3c5bc6ac07a4688d95e82e0abb8a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9A 4148 bytes
font_04_sfnt_off0000d92d.bin
d50f37cc7c4b08482a007a8fd8464ecd7b06873666d3f6d7018f7454e9241001		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD92D 16264 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.