Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc0483d01cff042…

MALICIOUS

PDF

56.0 KB Created: 2020-04-15 07:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1291811d48c1316051ca794daf775b80 SHA-1: 5f0aafce556c3d662eca8e8e26e5ebdb8d0915a2 SHA-256: 3cc0483d01cff0428641b3b334325a2a0f4ef0134dfc0ddc92cae33d44117b3a
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which are dynamically generated and point to unrelated content, indicating a link farm or SEO spam operation. The ML classifier strongly flagged this PDF as malicious. The embedded URLs suggest a pattern of redirecting users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://carpetcleancary.com/uploads/1/3/0/5/130550859/130550859.html#half+life+calculations+worksheet+pdf
    • http://levywise.com/uploads/1/3/1/4/131454207/zupeximumen-wefiranitinu-bizurepadipid.pdf
    • http://ecuadoroscuro.com/uploads/1/3/0/7/130776490/ae33a92.pdf
    • http://andrewssensors.solutions/uploads/1/3/0/6/130639123/dewepikelomu_pedafekotijixe_mosemilok_fowudise.pdf
    • http://customcycleshirts.com/uploads/1/3/1/3/131381840/9949439.pdf
    • http://researchtipsk12.com/uploads/1/3/0/6/130621542/forux-raxibajasaroki-jinolupuge.pdf
    • http://jusburritos.com/uploads/1/3/0/5/130542971/numujimepavenababab.pdf
    • http://epicairtandems.com/uploads/1/3/0/9/130969541/7638850.pdf
    • http://yourwellnesscounts.com/uploads/1/3/0/8/130873807/wuruneramiwefe-mulugipazirax-tozan-wudefopunon.pdf
    • http://conversations4life.com/uploads/1/3/0/6/130621401/1092680.pdf
    • http://cornholeimprints.com/uploads/1/3/0/5/130544086/fudal.pdf
    • http://conversations4life.c
    • 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_off0000aa07.bin
3e554ac2f880c6d182825506b1d078efe87e57e24cc70d988d3361219021db90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA07 8136 bytes
font_01_sfnt_off0000c981.bin
88fa90255074c80eb0de71fde994fec3c71a63c80279b85d8ac149ee1183bbe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC981 2900 bytes

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