Malicious PDF — malware analysis report

Static analysis result for SHA-256 a982f22291a78184…

MALICIOUS

PDF

76.4 KB Created: 2021-03-13 17:04:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e9e3e0620dc3df340c130b9287a6ba11 SHA-1: 6ac74adada4f38f84c0a03fc72e2ea0e8ea5e83c SHA-256: a982f22291a78184df9f6a380b2cdb57d9e55703400b2563fea4a44e7307a0e7
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links, with one prominent external URI pointing to 'https://xajibur.ru/aws?utm_term=4l80e+valve+body+repair'. This indicates the document likely serves as a lure to a malicious website, potentially for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/aws?utm_term=4l80e+valve+body+repair PDF link annotation
    • https://kuboteradaragi.weebly.com/uploads/1/3/1/4/131482952/53753121.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/fdhagdr/kizesizavopikobasuledudiw.pdfIn PDF document text
    • http://rimisirotox.iblogger.org/bible_for_java_nokia.pdfIn PDF document text
    • http://namafafiteg.mypressonline.com/jedaferanulerezele.pdfIn PDF document text
    • http://pivolirarorip.mypressonline.com/how_many_tournaments_on_the_european_tour.pdfIn PDF document text
    • https://kiniwotonupit.weebly.com/uploads/1/3/0/7/130776343/8203249.pdfIn PDF document text
    • http://bidusifekinu.66ghz.com/gonosekoxolujaxe.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/43276324608.pdfIn PDF document text
    • https://cdn.sqhk.co/zebimapajod/iQChddv/airtel_recharge_code_bd.pdfIn PDF document text
    • https://cdn.sqhk.co/xewafazuk/ujf1jeU/9340037876.pdfIn PDF document text
    • http://zamowafa.mywebcommunity.org/area_of_circle_triangle_square_rectangle_parallelogram_worksheet.pdfIn PDF document text
    • http://goxepuwusor.22web.org/natipa.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/yongnuo_yn-568ex_ii_nikon_review.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/55538f04-206c-48a4-bb31-27ccff4cd2e4/sample_spm_english_paper_1_directed_writing.pdfIn PDF document text
    • https://4541bc1c-e35c-4de3-bb44-1f53c3e1a56d.filesusr.com/ugd/68f66e_8de7b1a9e3664f358c64dbc0083e779f.pdf?index=trueIn PDF document text
    • https://2a403a33-5f6e-4534-96f9-742aa7325afc.filesusr.com/ugd/d2da83_25c821a649dd4cf3a287ff46d3f486a6.pdf?index=trueIn PDF document text
    • http://zuwolum.rf.gd/tajomixunefinivutegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e85223e6-938b-4ede-9eaf-c2fc9dafa4a4/unix_and_linux_system_administration_handbook_4th_edition.pdfIn PDF document text
    • https://5b2b9875-3923-4577-9ef6-0527498c95e7.filesusr.com/ugd/4e6dd5_2d090e4a313340beb56552705600e9cc.pdf?index=trueIn PDF document text
    • http://boxawigituwa.rf.gd/86165039147.pdfIn PDF document text
    • https://012a8781-80b6-4d33-8f63-56d56ef93f15.filesusr.com/ugd/6d3794_e52288bba4b24a3dabc1fd2d6e65cdc1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1830ed3f-7797-40dc-a2c2-d6535a82f1f9/xezovovuvu.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF24 5408 bytes
SHA-256: 80c056cba5c1c8789ee299602366d1c80089b9878d24bd1448af1e207c7efcfa
font_01_sfnt_off0001019a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019A 10276 bytes
SHA-256: 4cc2ea754495a4d2e2d1d5a817eca51dd8586cc6074ab9479521f21f077e30d9

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