Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1afccd4ec2e227d…

MALICIOUS

PDF

88.7 KB Created: 2021-03-05 20:50:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f1aba9d8ee124fab226a29ab54d9d419 SHA-1: 39e39e9596da581746a98113947f861688caaf9d SHA-256: c1afccd4ec2e227d16eeccd3890535a254146d9d0886e812cbc74dd141949455
156 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and ClamAV detected it as a phishing trojan. The PDF also contains a large number of external links, suggesting a link farm or SEO abuse to distribute malicious content. The ML classifier strongly indicates maliciousness.

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 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://jottigo.ru/wix?keyword=stagecoach+2020+ticket+refund PDF link annotation
    • https://cdn.sqhk.co/fuzomorikat/iidxcij/planet_of_the_apes_last_frontier_achievements.pdfIn PDF document text
    • https://vipukawolatu.weebly.com/uploads/1/3/4/4/134486161/roferixo.pdfIn PDF document text
    • https://dolevepi.weebly.com/uploads/1/3/4/5/134587457/6904767.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxogatuv/cLejj6T/ping_pong_online_multiplayer_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/kidirugolo/hhimegc/defamajubozu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/medicine_inventory_sheet_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/70984417392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cad576e-93e3-40cd-b61d-b6f617bc2c78/powozujopisufisobaj.pdfIn PDF document text
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_b016f02227fe455daea9970e04e4913a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/litunux/ldl_nice_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcb5e59c-1afe-41f4-bae2-efb060e72c5c/lokujesamajopusadosovevot.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/osrs_barrows_guide_for_pures.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/piano_music_sheets_with_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/upsc_ias_ka_full_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec7d6c71-3acd-4301-b9c3-759127d56d41/conair_handheld_steamer_bed_bath_and_beyond.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80233fd4-be0a-48b3-8e2b-d2da2d534747/fuludidusevijuxivi.pdfIn PDF document text
    • https://69868269-04aa-4a0d-8379-1371762fd556.filesusr.com/ugd/d8beff_ef1d250deb1d420aacd9627d76b4be7e.pdf?index=trueIn PDF document text
    • https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_3e6e62cafc9143d78761e8076c5f4885.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF96 7304 bytes
SHA-256: b586d36e7f9e0e654daa1c7057cbdcdd588683dd3102080e5b11adaf424448d5
font_01_sfnt_off0001083f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083F 5516 bytes
SHA-256: cf28c4d7b9283fecde4d93fcc7a0d091a73bd1c8e6aa87624290862bc3f85b2b
font_02_sfnt_off00011b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B00 10640 bytes
SHA-256: 61c57d952291ec2ea567f56c84d21f57c88abbd25d7f47fadf8a7ac8f4da4853
font_03_sfnt_off00013f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F9D 16268 bytes
SHA-256: beec37f135ee97cc43f5cfa6e53be96d713bd9afea7cf77bd52f7c7e78e3abb4

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