Malicious PDF — malware analysis report

Static analysis result for SHA-256 80900feee308c797…

MALICIOUS

PDF

41.6 KB Created: 2020-03-28 09:59:28 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c031324a3b79e0ebff593288894fe007 SHA-1: 49c5c5f4f14abc7166253ca4371444165ea99ee0 SHA-256: 80900feee308c797a6c709de5d8b8a4137f48b635509a4d39586715006f8271f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded document body text, though partially corrupted, contains URLs that are likely part of a link farm or a mechanism to redirect users to malicious content. No scripts were extracted from this sample.

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://growmygardens.com/uploads/1/3/1/1/131163876/131163876.html#1+centipoise+is+equal+to+poiseuille
    • http://parallelgirls.com/uploads/1/3/0/2/130287313/8927734.pdf
    • http://angelswinklashes.com/uploads/1/3/0/5/130588931/lorisuz-tupuzoxi-rikebovuguj-deluweduxiz.pdf
    • http://fubesac.store/uploads/1/3/0/5/130551324/7622250.pdf
    • http://rocktrainer.app/uploads/1/3/0/5/130551294/4b056e8f9714367.pdf
    • http://cradleinferno.com/uploads/1/3/0/5/130590738/bosukudeza-tajelefoxulox-nalawalawusew.pdf
    • http://carolinegadsby.com/uploads/1/3/0/5/130545434/31a7f.pdf
    • http://ns1.socialsciencedimensions.com/uploads/1/3/0/3/130313379/84263aeca552.pdf
    • http://snohomishminigolf.com/uploads/1/3/0/6/130621576/1419f20.pdf
    • http://accountingredflags.com/uploads/1/3/0/8/130874128/2325755.pdf
    • http://roofwastehaulers.com/uploads/1/3/0/5/130590092/bimegokolar.pdf
    • http://moonshinemanorweddings.com/uploads/1/3/0/7/130740512/gezerazi.pdf
    • http://missbsgarden.com/uploads/1/3/0/6/130604287/jitegosa-vebixuzakex.pdf
    • http://modwsu.com/uploads/1/3/0/3/130324126/74ef63.pdf
    • http://schnizzylu.com/uploads/1/3/0/7/130739773/6933061.pdf
    • http://thewhoamikidsproject.com/uploads/1/3/0/7/130738731/nalemik-tumewuxulo-bejibewo.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063f7.bin
ea4e69ace29678880d2966eba6e1f0eb6d672ac088f3d037190136e2d9327ebb
pdf-font-stream PDF embedded font (sfnt) at offset 0x63F7 7620 bytes
font_01_sfnt_off000081d9.bin
fa4a47c9d7ef717199dd1a7e01271bb15aa815e0ae824df7847fe60225bda745
pdf-font-stream PDF embedded font (sfnt) at offset 0x81D9 16104 bytes