Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9cf048efeb6876…

MALICIOUS

PDF

86.2 KB Created: 2021-05-29 17:40:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f16be84cfe3349ff071abc4e519f615e SHA-1: 295f93b0d7cfa70960451e176496bdb6b68abd99 SHA-256: 0e9cf048efeb6876e6c0178e251bdc75c737419baec94aacca28a6e1e1414298
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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 https://vilenefex.ru/123?utm_term=antigona+sofocles+millor+fernandes+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421783/normal_603e087369e72.pdfIn PDF document text
    • https://xudaxeja.weebly.com/uploads/1/3/4/3/134339900/8049998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410441/normal_5fd371c1b8716.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453889/normal_60174aca9fbf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368503/normal_5fe715b79062d.pdfIn PDF document text
    • https://nevimemiwuje.weebly.com/uploads/1/3/5/3/135332714/tijilunaxavafep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464521/normal_60298cf29db85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457843/normal_60585e5f18b74.pdfIn PDF document text
    • https://fenutirixe.weebly.com/uploads/1/3/4/6/134640366/0f9188ac35c.pdfIn PDF document text
    • https://jolidezebixisu.weebly.com/uploads/1/3/3/9/133997790/2724312.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/adde8955-efad-4059-8612-6bf1f547027f/puwuvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1073b56-f92b-439e-a9ec-2f1608388ac1/how_to_tell_lennox_furnace_age.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c0a8aaa-3fe1-4e7b-ab0b-bf84e4365389/dufubigevud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d403eac3-1455-47e3-882f-824daf589928/is_garmin_better_than_apple_watch_for_running.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe02eef7-a74f-48f0-8b5f-bcf6082c28d6/lotebokasujabenalogonixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56127434-c0d7-4733-81ab-6d59978cc867/33139822088.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62688d78-a7b8-4469-92b0-fe0d7367c799/53054159904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed59d3d0-7d60-4bf7-aac5-8b06bd36839a/the_disaster_artist_movie_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b7a6685-6057-4f79-8f18-ecb110634d6d/uk_police_ranks_military_equivalent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78fe71fb-c150-45bf-add9-1417697e9b45/befaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/229bbf48-2199-46fd-834f-f96ff87612e2/tejukenerufovulevodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6337af2a-e2e4-4760-a7ce-593c03b9303f/33106830848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/251d5ce3-75c1-48df-a932-1ad8564904a0/how_to_reset_lg_portable_air_conditioner.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF734 5464 bytes
SHA-256: b31a36a9a606647682bb74d6b6e4c471b24c7bd58c59c1f01ef9bb4567ca0359
font_01_sfnt_off000109bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BB 13792 bytes
SHA-256: 7929bf02585e90c2ee0f7b41504399174c1eda44a7e17178a6776e81b95af2b4
font_02_sfnt_off000133df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133DF 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15