Malicious PDF — malware analysis report

Static analysis result for SHA-256 470da3736dc2ca27…

MALICIOUS

PDF

35.4 KB Created: 2020-05-13 04:41:21 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 17249f33c1b67ea9a5fc8fec42995bbd SHA-1: 93f2b8a854f5c5a56b466e61ec5fc8ae74456fc0 SHA-256: 470da3736dc2ca27e4a655271770918371df2ecc79e72d01dc25bf768fbc0507
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, many of which are numerically or generically named, suggesting a link farm or SEO poisoning tactic. The document body, though heavily obfuscated, contains references to 'Apple service diagnostic' and embedded URLs, indicating a likely attempt to lure users to malicious websites. The ML classifier strongly supports the malicious nature of this PDF.

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://aosterphotography.com/uploads/1/3/0/5/130588509/130588509.html#apple+service+diagnostic+3s146
    • http://summerhouselavender.com/uploads/1/3/0/2/130270941/6619767.pdf
    • http://stemcellscentralflorida.com/uploads/1/3/0/6/130639808/999de07eee12c3.pdf
    • http://mariabraganini.com/uploads/1/3/0/3/130312998/8897777.pdf
    • http://jouettlaw.com/uploads/1/3/0/6/130620998/mujuw_mizubowuzu_fomogisebi.pdf
    • http://kostasloukos.com/uploads/1/3/1/4/131406274/96e504696b99.pdf
    • http://migrod13.com/uploads/1/3/0/2/130289241/xojogijujedogu.pdf
    • http://rodneyreedbailbonding.org/uploads/1/3/1/3/131378921/9637230.pdf
    • http://suntnorociteru.com/uploads/1/3/0/6/130603698/bufejaniv.pdf
    • http://deboramirandastudiohair.com/uploads/1/3/1/4/131407395/1313977.pdf
    • http://cafealbala.com/uploads/1/3/0/9/130969465/bufazosamur-nadotofulobok-juwudedufiwakev.pdf
    • http://onedancersvoice.com/uploads/1/3/0/6/130605156/1e2df.pdf
    • http://stsanitation.com/uploads/1/3/0/7/130776196/rejadajudoduvuz.pdf
    • http://tarrascoachingandconsulting.com/uploads/1/3/0/8/130874029/sesuvimepagujinuziw.pdf
    • http://psyourparty.com/uploads/1/3/0/7/130776769/gunaxu_betirivatoboma_jukedap_kasifosal.pdf
    • http://rsc-industry.com/uploads/1/3/0/7/130739081/xedelofufi.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_off00005812.bin
4f79ca8d825f91d5e1b9c3c6296ef024ff3d88ca7bb99f3440094f7183445ae3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5812 12288 bytes

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