Malicious PDF — malware analysis report

Static analysis result for SHA-256 daed8496ef1d92ce…

MALICIOUS

PDF

78.0 KB Created: 2021-06-09 02:20:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8276602caa27f086861646d0ce3d2776 SHA-1: 9b756c52239a01626d382070a347ef6f88f2b79b SHA-256: daed8496ef1d92ce1f0e00582c250074d7c5077e520b9df520f8cf1f6888a705
186 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 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 0.9998

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://jottigo.ru/123?utm_term=swot+chart+template+powerpoint PDF link annotation
    • https://xodozevonewoze.weebly.com/uploads/1/3/1/3/131384462/56477b65e41.pdfIn PDF document text
    • https://vudovonijojor.weebly.com/uploads/1/3/1/4/131437364/fikexo-roxejiwadenikob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_6049682d70a97.pdfIn PDF document text
    • https://pagebuso.weebly.com/uploads/1/3/5/9/135972497/jizaluzo-bodab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427783/normal_60045f95c36c4.pdfIn PDF document text
    • https://zaridonuxubotu.weebly.com/uploads/1/3/0/7/130775126/6283777.pdfIn PDF document text
    • https://tadivibudup.weebly.com/uploads/1/3/4/8/134899420/194982.pdfIn PDF document text
    • https://polujififodujan.weebly.com/uploads/1/3/4/5/134512681/5459364.pdfIn PDF document text
    • https://monuwapomobi.weebly.com/uploads/1/3/4/7/134730240/rutuvesebobiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481852/normal_603eded8e0ba6.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/feacdd51-f614-461d-951b-c7a08e711b58/21260522887.pdfIn PDF document text
    • http://wepoline.pbworks.com/w/file/fetch/144678309/29340066737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bbfe7ee-76c9-4b69-b38c-ccf1286e672a/dragon_age_origins_arcane_warrior_leveling_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96884e73-d7eb-440c-b29f-b57f51b532cf/in_what_ways_were_the_civilizations_of_mesopotamia_and_egypt_alike.pdfIn PDF document text
    • http://joxupakager.pbworks.com/f/i_just_wanna_rolex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fa0a631-fd74-4a53-b157-c6658fdb33df/neneviw.pdfIn PDF document text
    • http://dibesusajob.pbworks.com/w/file/fetch/144626292/book_of_baruch_chapter_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec3433ad-e6a0-4983-8a64-30c33cd05247/la_crosse_technology_alarm_clock_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b49873f-2fe9-4b45-9646-14cb290e694a/parallelogram_worksheet_kuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce3b6f6d-6f27-400a-a11f-9ee733a47bb1/how_much_profit_do_pawn_shops_make.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_off0000f3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C4 5192 bytes
SHA-256: 7684a8cc0ac150a29bdbe49809c145750c5d659f3bcba959a14b0e60dbf550bd
font_01_sfnt_off00010557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10557 11012 bytes
SHA-256: 7be4d19b1d3af7c6eccb1f882a26402d304d92733eee484565e40b693b50d880

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