Malicious PDF — malware analysis report

Static analysis result for SHA-256 435b7a4a937b3492…

MALICIOUS

PDF

90.2 KB Created: 2021-05-22 03:27:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7cd4b7123f85bb086ed47d7b91568a02 SHA-1: 19afb4611a2f08290a2e4b996ca0a1f71d936c59 SHA-256: 435b7a4a937b3492e43183f13d5741a5466bf77d61d024a5b223eb385a739c73
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 0.9997

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://ponafet.ru/strik?utm_term=how+to+build+time+management+skills PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457848/normal_603f3165f33ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404739/normal_5ff1167bc94bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423171/normal_60384ead291f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447108/normal_604dd23b80a78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469626/normal_6026cd1a792e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470972/normal_604931af9edea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385014/normal_5ffe1992bf0c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416490/normal_601911b4da6eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371806/normal_5fc959a802e1a.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/wefemabeni/92187880490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f37a50e0-211f-48b0-b2e0-acc0ea66831f/how_to_repair_radiator_fan_motor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a5f1558-e80b-4069-be18-0729bb6c8a8d/dyson_ball_animal_pro_vacuum_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/77086914829.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/how_to_make_a_bridge_with_popsicle_sticks_and_glue.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/nonviolent_communication.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/fractions_decimals_and_percents_worksheets_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ffb5642-165b-4ab4-9095-1344db21909f/rofakosiwuvogasazozefuru.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/6550789166.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/filter_excel_spreadsheet_by_two_columns.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/nunutiwen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccc14188-8646-45a2-a7ae-023df0cb6f55/iron_maiden_stranger_in_a_strange_land_bass_cover.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_off00012684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12684 5304 bytes
SHA-256: a40fe785979e56e812c385593af70011dec3a0634312cf942c05c68ca2e9d56d
font_01_sfnt_off0001388d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1388D 10228 bytes
SHA-256: b752eb1debf5c4e5c548b49cf043600a42fac56aa55120872ec9b855d58f5c87

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