Malicious PDF — malware analysis report

Static analysis result for SHA-256 441488e26b8ce040…

MALICIOUS

PDF

79.3 KB Created: 2021-06-16 00:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ab3719e6a49a793b2c02c10723c090b3 SHA-1: ecf6497cfcca395524303b87b48d59904e5b3a3a SHA-256: 441488e26b8ce040a2c5912a6b707a9a632f402bd730bd4a545b3daf9b1df60e
186 Risk Score

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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • 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://dugedepap.ru/wb?keyword=how%20to%20connect%20bluetooth%20headset%20with%20smart%20tv PDF link annotation
    • https://lufiwusogak.weebly.com/uploads/1/3/4/3/134319395/3e22001d.pdfIn PDF document text
    • https://mivezosikobo.weebly.com/uploads/1/3/1/4/131453246/236574.pdfIn PDF document text
    • https://wosumugip.weebly.com/uploads/1/3/4/8/134867897/7705020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458145/normal_60055eef5d882.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381090/normal_5ff519204be7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529095/normal_5ff9bcb8a8fee.pdfIn PDF document text
    • https://mubasaji.weebly.com/uploads/1/3/4/8/134846322/335c9b7c.pdfIn PDF document text
    • https://sosuxivi.weebly.com/uploads/1/3/6/0/136056733/roniresebori.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366340/normal_5feedc3e6f837.pdfIn PDF document text
    • https://nawigabijaku.weebly.com/uploads/1/3/4/5/134599080/7469262.pdfIn PDF document text
    • https://tivufele.weebly.com/uploads/1/3/4/6/134615601/5c9016e04589.pdfIn PDF document text
    • https://vodesaladamaju.weebly.com/uploads/1/3/5/2/135298616/sixenivigower.pdfIn PDF document text
    • https://sagabeju.weebly.com/uploads/1/3/4/6/134659190/wirozamax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60c565614db0245bdd7ff9d9/1623549281632/varma_tamil_full_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef704951-d9bf-4f32-8ab5-f6ed6ad56468/kayla_itsines_workout_plan_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a975867-36e2-402a-a752-cb47e97a5f5a/calabozos_y_dragones_reglas.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60c8554aeeebac734b1ae0ee/1623741770804/how_do_you_connect_airpods_to_android.pdfIn PDF document text
    • http://maxasol.pbworks.com/w/file/fetch/144728931/6031723248.pdfIn PDF document text
    • http://gibuwodebu.pbworks.com/w/file/fetch/144604842/what_does_the_word_oceanology_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c605e9a-5366-423f-920d-2d0b637dea12/yowhatsapp_apk_8.0_download_latest_version_anti-ban_in_2019.pdfIn PDF document text
    • http://jabodawo.pbworks.com/f/79331730366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c70e0343-b6c9-4ea5-8c66-adab541979e1/kitchenaid_glass_stove_top_cover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82c0247f-120f-4ab9-94d4-5a0e9adb0511/8422372877.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_off0000f6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FF 5432 bytes
SHA-256: c90da0c75e87da0852cc3edd0847655293c6323c13da5a3f557074b807301e58
font_01_sfnt_off0001095c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095C 10664 bytes
SHA-256: 56163166fcfaacba3bf3ad9a81f17995cf3b57f3502faa97ce00fc30ffd40f66