Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1f506b24f37728…

MALICIOUS

PDF

108.2 KB Created: 2021-01-15 13:44:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8f5a1e5d9a8ab9f04c6fe32c334c136 SHA-1: 772ea118f82729c940ec51e970864b769420cee4 SHA-256: 3d1f506b24f377282c6d4136d621bd01f5c676d51c20cb6e0d0d01902e283748
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically identifies the document as a non-clustered link farm on disposable hosting, further supporting this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://traffset.ru/aws?utm_term=baloo+bhaina+font+free
    • https://site-1178232.mozfiles.com/files/1178232/52999507497.pdf
    • https://xosuloduviz.weebly.com/uploads/1/3/4/8/134890731/abd4efe.pdf
    • https://site-1177662.mozfiles.com/files/1177662/dujoxoniwa.pdf
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7304884.pdf
    • https://site-1168348.mozfiles.com/files/1168348/bouncy_hoops_tips.pdf
    • https://nelibijejukeli.weebly.com/uploads/1/3/1/4/131437261/zudube_wolaneva_fumemovekanirap.pdf
    • https://sanivuledaxefe.weebly.com/uploads/1/3/4/2/134234591/1655890.pdf
    • https://cdn-cms.f-static.net/uploads/4368978/normal_5fac2ae6202fe.pdf
    • https://site-1245107.mozfiles.com/files/1245107/tikurukulefegelixosijav.pdf
    • https://gukepofefefika.weebly.com/uploads/1/3/1/4/131437977/8320736.pdf
    • https://site-1176004.mozfiles.com/files/1176004/guide_for_mario_64.pdf
    • https://cdn-cms.f-static.net/uploads/4465127/normal_5fad67404fd58.pdf
    • https://cdn-cms.f-static.net/uploads/4460243/normal_5fa1c233bd892.pdf
    • https://cdn-cms.f-static.net/uploads/4378606/normal_5fb536e1d3733.pdf
    • https://site-1177365.mozfiles.com/files/1177365/sesegesomativobezitivexu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • 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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df04.bin
bdad213ebd28cc5a645a9b7390281962a2c264f2704c57e8e925944d7102b90b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF04 8504 bytes
font_01_sfnt_off0000f52e.bin
a90f070b17a5b0d58162b1b43ce4170521970974a7f28a4ee295505bf07e3986		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF52E 4868 bytes
font_02_sfnt_off000105b1.bin
6ce3ed3d0cf168fbf74d6eb321148d5efc31cda11559831b77020f7d4c9f4c8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105B1 3740 bytes
font_03_sfnt_off0001112c.bin
2b2b75dc0bd92a75618052da0c3d95e6c631598cb6ea2b16e2ac3cdbf34258f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1112C 23948 bytes
font_04_sfnt_off000156c2.bin
ff45ead8373cf8a936e21d4036b049b80e415ba08420048f4a2feaba3100e01b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x156C2 17136 bytes
font_05_sfnt_off00016f2f.bin
a051f96bade6ef9db09a682a418db5a2887596b5e56fce14a73b34ba089e5b07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16F2F 17248 bytes

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