Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4181f682f30560d…

MALICIOUS

PDF

81.4 KB Created: 2021-03-16 11:24:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ff595813f47973a017ed531c6d2819ad SHA-1: 5b6e95f8e563c17be22043fed3c0107e27172e24 SHA-256: b4181f682f30560dc42a6d9d9e06e6186886b612b1f0d1bc2016cb518891196e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/wix?keyword=cub+scout+ranks+2020 PDF link annotation
    • https://cdn.sqhk.co/sivadapexiri/Sjaidif/32900201121.pdfIn PDF document text
    • https://cdn.sqhk.co/mokabawimav/chV4hfF/85241499263.pdfIn PDF document text
    • https://cdn.sqhk.co/norejasiwiza/gdXjgia/february_2019_blank_calendar_template.pdfIn PDF document text
    • https://cdn.sqhk.co/pumopijaku/il3QicZ/konica_minolta_bizhub_c227_manual.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/jivagajamav/craftsman_139.539_manual.pdfIn PDF document text
    • http://genufewewirim.rf.gd/10949062716.pdfIn PDF document text
    • http://goduziposu.rf.gd/sobemagakukajebovulanit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe304602-7948-4d9c-bbee-ae7ef23b51b2/what_do_cherry_blossom_trees_look_like_in_summer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3017dcf5-1740-4c5f-aaed-98f76614bbdf/20939313319.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/22109633239.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a49a6ac0-74a8-4ec5-ac28-82a9eec2b9c0/food_safety_auditor_jobs_melbourne.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd979244-82ff-455d-861e-c21c893775e4/95208793112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae709ce9-729e-4ace-8ded-bc30e0db7412/the_nicomachean_ethics_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/battlelog_web_plugins.pdfIn PDF document text
    • http://jilutuve.rf.gd/item_shop_pro_game_guides.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c067c5c7-ea34-41c7-8efb-99e953b7b1b1/85066063673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f92a80ec-c738-4900-8442-1dc7cbe799d8/how_to_reset_kitchenaid_built_in_refrigerator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1e9525d-851f-4f41-a6c4-67c36d640639/nikon_n8008_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd8a9d4-4d82-47e3-93e4-13e2ed5ac1e6/sauder_homeplus_storage_cabinet_assembly_instructions.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AC 5144 bytes
SHA-256: a4020ae7eb35639bfd23b5813429b1b240304f3e7abc372ec4370567fad579c8
font_01_sfnt_off00011236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11236 10928 bytes
SHA-256: 1f18e723fce7ba3e0099f1e6fd62caaf501aaff127647ca9bb5ee5478a0ada20

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