Malicious PDF — malware analysis report

Static analysis result for SHA-256 e85166f9c9768c9a…

MALICIOUS

PDF

37.9 KB Created: 2020-03-29 09:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f717ac096e5c2247b9c336a3f0a1a0a2 SHA-1: 96b5ef1c4c658350b0c6b5c1dbf658c6b0c68e1e SHA-256: e85166f9c9768c9abbe3146b67ad455c46d0be22bb9265cc99c4503c9ea5d52a
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a common tactic for SEO link farms and potentially malicious redirection. The document body, though partially corrupted, contains a title related to multiplication tables and references the wkhtmltopdf tool, suggesting it was generated programmatically. The primary intent appears to be directing users to a network of linked websites, likely for malicious purposes such as phishing or malware distribution.

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://qualitycareafh.com/uploads/1/3/1/3/131384359/131384359.html#juegos+de+las+tablas+de+multiplicar+8+y+9
    • http://moonlitdreamspublications.com/uploads/1/3/0/4/130478374/2e5a56a6.pdf
    • http://noahcaseycounselling.com/uploads/1/3/0/7/130775503/6875266.pdf
    • http://restorationincoporated.org/uploads/1/3/0/8/130873851/gokikesusatidelasub.pdf
    • http://presentationsistersnz.com/uploads/1/3/0/7/130775196/majizidogiden.pdf
    • http://luciddryeams.com/uploads/1/3/0/7/130776676/5214821.pdf
    • http://wildchattanooga.org/uploads/1/3/0/6/130639963/nelaf.pdf
    • http://styer-fitzgerald.com/uploads/1/3/0/8/130874086/238454.pdf
    • http://www.shopupward.com/uploads/1/3/0/6/130603745/mifonuwuxixufi.pdf
    • http://vuedunordfoods.com/uploads/1/3/0/6/130621847/lilafazaferasumuwufu.pdf
    • http://denneraephotography.com/uploads/1/3/0/6/130621619/4111431.pdf
    • http://www.hitfan.net/uploads/1/3/0/6/130621261/povewevem-pujuwukirobit-gebibevonolamep-gajowug.pdf
    • http://atlasdrivingschools.com/uploads/1/3/0/4/130436078/wufapagufapebox_gotibaxotomuk_wovaxo_lanugokudoru.pdf
    • http://tristarlogos.com/uploads/1/3/0/4/130489152/ca3901.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069cc.bin
a531a7f34a4862929ff180c9a58dc1f3683a245ef5b0bcf68fa57a3a14485d55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69CC 8412 bytes

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