Malicious PDF — malware analysis report

Static analysis result for SHA-256 caea3dab8e56bc64…

MALICIOUS

PDF

102.7 KB Created: 2020-03-16 15:47:52 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d8497a3acdb4d74a85152c790d0fb8fc SHA-1: 72cee48dc330b4518c5fc90cfef4ed65d1a3ac8c SHA-256: caea3dab8e56bc64aa15333a2fed027e987f66cb230abca91bec00ae5fb7963d
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a PDF link farm, designed to direct users to various websites. The primary link points to an HTML file, suggesting a potential phishing or redirection attempt. The ML classifier strongly indicated maliciousness, supporting the assessment of a malicious link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://adsl-63-204-18-53.benefitplans.org/uploads/1/3/0/3/130323573/130323573.html#hunter+x+hunter+feitan+birthday
    • http://rankya.in/uploads/1/3/0/8/130874292/9fd7f72b1b.pdf
    • http://cpanel.winwithwill.com/uploads/1/3/0/8/130873838/deca0ded29.pdf
    • http://webmail.thebellevie.com/uploads/1/3/0/3/130379803/gugoludasufuv_turixik_jakorap.pdf
    • http://lightningcider.com/uploads/1/3/0/3/130313213/fbc703f24f8.pdf
    • http://gryphontor.com/uploads/1/3/0/8/130874123/540b86eac71ba.pdf
    • http://culturalinnovationgroup.org/uploads/1/3/0/4/130489830/vabenumes-tekako.pdf
    • http://nightshadejewelry.ca/uploads/1/3/1/0/131070407/b61c8b12250.pdf
    • http://cabaproject.com/uploads/1/3/0/5/130588384/tamobe.pdf
    • http://waggawaggaprobus.waggamatters.com/uploads/1/3/0/5/130547038/refuku_riwosigesadepi_xaxade.pdf
    • http://hostmaster.peanutshuffle.club/uploads/1/3/0/5/130539125/24754fe0d917cb.pdf
    • http://bayflier.com/uploads/1/3/0/5/130552106/a2daa8.pdf
    • http://damathitsar.com/uploads/1/3/0/7/130739234/874f2f184d7.pdf
    • http://fs-hardscaping.com/uploads/1/3/0/3/130323630/tekuwinomagibebivu.pdf
    • http://ibuyhomesfastcashllc.com/uploads/1/3/0/9/130969829/vijapaxobizefap_lumike_rorerod_selikemepe.pdf
    • http://stankarwoski.com/uploads/1/3/0/7/130739105/sajurawoxin.pdf
    • http://sophiarosewellness.com/uploads/1/3/0/4/130488227/foduku.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_010_off0001732c.bin
5d2c1c28b8daafc54154a335084dbdcbc815224371e7b2c8032f070edea0ae61		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1732C 17332 bytes
font_00_sfnt_off0000d727.bin
77fa460b1e59b0d4a75f10e4bf096be69ebc3bdb283e4d3f8b98bc03fd461163		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD727 10340 bytes
font_01_sfnt_off0000edd1.bin
e43681a60a3b0ef7b3219a8defb1d6cbbbd1056f2f89c05d1e38b764c907b66d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD1 10716 bytes
font_02_sfnt_off00011267.bin
2c544b8c0539b356e1701f7f7cbf1f3d794f97299eb3e871c36262c06fc559b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11267 27140 bytes
font_03_sfnt_off000165eb.bin
1250d87604482f93b449fb4acd23be1e2de0324e424ae3b6fcb7cb09a4a813cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x165EB 3804 bytes

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