Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bfd04be2b9353a8…

MALICIOUS

PDF

104.5 KB Created: 2021-04-02 12:12:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b737b500468f29a20e5860e30e970388 SHA-1: dc8752c74f1511607f802450162f765544d7221f SHA-256: 0bfd04be2b9353a8df5528d780e209e86aa25af6ada6adbd3baaa6239cd22153
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a tactic to drive traffic to potentially malicious websites. One of the primary external URIs points to a suspicious domain, vilenefex.ru, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV also strongly indicate maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/wix?keyword=gardner%2527s+art+through+the+ages+pdf+free
    • https://fefugenaxidoseb.weebly.com/uploads/1/3/1/3/131380158/4fbb4ed388942.pdf
    • https://wepujemu.weebly.com/uploads/1/3/1/4/131453456/7095e2c45a3c1c.pdf
    • http://dronextactical.xyz/acidosis_metabolica_por_diarreailkt6.pdf
    • https://jonumupemusegiw.weebly.com/uploads/1/3/0/8/130874210/9823084.pdf
    • http://dojemop.mywebcommunity.org/67558775927.pdf
    • http://megidexabaror.mywebcommunity.org/70710253782.pdf
    • https://sidutoxa.weebly.com/uploads/1/3/4/8/134886075/39e9bdeaf138.pdf
    • http://vidclips.design/xafalunisiwumepabimubijw6lwt.pdf
    • http://duwinijuj.mypressonline.com/what_percentage_of_the_uk_are_criminals.pdf
    • https://porojole.weebly.com/uploads/1/3/4/4/134462866/kutekategozupalo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f27bca7f-571c-471d-9e77-92385e6dfcd0.filesusr.com/ugd/9a0fa1_39b41491e997458cbc045ca63bbd6efa.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ff58c14c-8343-485a-8a38-8d1b0bbf375a/77093891128.pdf
    • https://66547991-fb4b-492c-b271-2b6457db34f0.filesusr.com/ugd/a98e70_4da12b89cac64610846986271643bc91.pdf?index=true
    • https://e082cb0d-9c22-4a21-acb7-e2c6127a51d3.filesusr.com/ugd/ff0c06_69bade276e514dd3a326e613f2d607a8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8e43a2d9-cb71-47b3-8df1-593bd7344aa1/51151974245.pdf
    • https://cfff6b0e-fc0f-4d9c-a983-c0e60c8b2bfd.filesusr.com/ugd/c637e3_49d69fd16cbb4146b0abe7532a0ca162.pdf?index=true
    • http://rodedewezijore.atwebpages.com/adjacent_vertical_complementary_and_supplementary_angles.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/
    • http://scripts.sil.org/OFL
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff01.bin
81d6d0b0220189d9fda7c4ae4265fb5c0cf1b1f47ad861edfe873417ee871fef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF01 4184 bytes
font_01_sfnt_off00010de8.bin
362be52356404fbe744142f7193626bf0a9aba75472c620ed4d33d2bedf18e2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE8 5336 bytes
font_02_sfnt_off00011fd5.bin
edc99b145c59d83e31e206b1456482e404d264260aaea0f5e30d506ef5e7cfcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD5 6348 bytes
font_03_sfnt_off00012f41.bin
743fb39602e32fd45f4a1344c4f6a9800c07ecd5b543f6ae2a621693c14984bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F41 2076 bytes
font_04_sfnt_off00013842.bin
cf785a4fbbb27f367b368c50702eca61e16604b8470223a8841c468586fc465f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13842 14472 bytes
font_05_sfnt_off000168e5.bin
5894ad5bbdc4817c6be147afc4a4cb6ab4ed35863c813ccb292fbddcfb979f23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x168E5 16840 bytes
font_06_sfnt_off000180a9.bin
27d0883147f706c974cabb80d1bda94a74696023d70b026d1513b1a654c67cc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x180A9 6340 bytes

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