Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a9226054e71ed3b…

MALICIOUS

PDF

83.1 KB Created: 2021-03-14 23:53:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 718d9199bc07ebe9641994aa48e94e72 SHA-1: 152de06d5e2530930e324f033d1a73cdcacbb069 SHA-256: 8a9226054e71ed3bbb32d978ac3eebfe1d1c35f4fa1e555d410340dd8819deec
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with the primary malicious URL being pelibifir.ru. This suggests a phishing or SEO manipulation attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via the linked URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/strik?utm_term=how+long+till+my+16th+birthday PDF link annotation
    • http://figojusu.iblogger.org/juwefenujamakovexeg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421208/normal_5fc853b1a4273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370263/normal_5fd80ecba2468.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409814/normal_601751f70ef5a.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/04e57858-542b-49fb-a9b0-94d994d9c2eb/5937375029.pdfIn PDF document text
    • https://a72b158e-cead-41d6-a0b3-8518216316a4.filesusr.com/ugd/35c6e2_6a9ae83e7c8b4dd0ac76cc884ee5de9a.pdf?index=trueIn PDF document text
    • http://gilebufamefaf.rf.gd/complex_wavelet_transform.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/autocad_commands_with_examples_free_download.pdfIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_6c4aeba3d3ec4e5cbc045250c0c5373c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/beyond_biocentrism.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/nagagedobejejilupirag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bb99339-98ea-4be7-87a2-5871515ad30a/when_is_the_new_moon_february_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1de51d94-751a-4e95-9fa4-cbf3d08925f5/88918097793.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/82848940804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18e43c55-49ef-4bd8-b48d-33cdfa1cdb65/what_sauces_do_buffalo_wild_wings_have.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/segmentation_in_rural_marketing.pdfIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_b062cdf6af3e437f9c4d33c5bacc87da.pdf?index=trueIn PDF document text
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_00f8888070f54f10a14c36bcefcb0fd4.pdf?index=trueIn PDF document text
    • http://guwivuvasexi.epizy.com/mutopevipotanuxuk.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/cooler_master_cosmos_c700p_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/complete_mage_feats_3.5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f2fa0bc-670f-4129-b760-a40bd3dda960/how_to_use_a_porter_cable_air_compressor_to_fill_tires.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_off0000f194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF194 5564 bytes
SHA-256: fcc5554ec76a3dc60d25ef7353744b7aad116a118b498deed2654236372ab168
font_01_sfnt_off0001046b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046B 10648 bytes
SHA-256: 8040e9a9ba3e7adbe5caaa5bef8e1636bec058fe78d6301d8ab26392935b117d
font_02_sfnt_off00012925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12925 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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