Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d91dadc43f7608a…

MALICIOUS

PDF

75.6 KB Created: 2021-03-13 14:32:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: dffa81c19f1138f3a5c51fc40ea3a250 SHA-1: 6c645b8a1917d3e08ecf3741843723ceda6b2345 SHA-256: 0d91dadc43f7608a33c9f70afc02d8d9566f2f66b7aefc5c1092b6282ce83a17
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'hacked client', indicating a social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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://golowaki.ru/wix?keyword=deluge+1.8+hacked+client PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450514/normal_5fd069423bef8.pdfIn PDF document text
    • http://lordtrans.ru/51355419663w1fq5.pdfIn PDF document text
    • http://form-lnstagramcopyrightservice.com/9354772500cdcjb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457318/normal_5fc69cda6a462.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413223/normal_5ff8d38f7d045.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428342/normal_60143fea4b6c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402504/normal_6030848b84b95.pdfIn PDF document text
    • http://vquest.website/orbit_sprinkler_valve_not_workingpzo2w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_5fe6ac34e1317.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470543/normal_60049ca02b25c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379960/normal_6039b1c5142c8.pdfIn PDF document text
    • http://luminar3-download.xyz/mawiwafaladogaxutiteurbkb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420430/normal_5fdd5ed41d8d3.pdfIn PDF document text
    • http://strita.space/environment_friendly_powerpoint_templatesexaxu.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/affd8532-0d83-42af-a9c4-8aa0d65efd59/scid_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1e35f55-6d83-4677-bfab-718fab4fbac5/how_do_i_run_channel_auto_scan_on_element_tv_without_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/colonisation_of_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/72247802541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc58c34d-fa96-4dea-82b3-e6854a5ceccf/chefschoice_4643_prontopro_diamond_hone_manual_knife_sharpener.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49ba8420-d982-4d91-9b34-8495b876938c/pantum_printer_review_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ca125a6-348e-459d-ba1e-ae885b49dc75/black_and_decker_digital_advantage_iron_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20746fc1-68a7-4aba-80d6-40b0965eca29/ingenuity_baby_swing_cover_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/49051648721.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_off0000e7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C4 5268 bytes
SHA-256: f6f6e3355ccdae3dbc3db401a6fe122a2419fea787f82a367a727914661ca8f9
font_01_sfnt_off0000f9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B9 11992 bytes
SHA-256: adda9bdbf253542ea2dfe0bcc478541c3d22ba82743ad5980c99e8ca4f387b87

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