Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2d44d561716740…

MALICIOUS

PDF

77.3 KB Created: 2021-06-14 10:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: afa74eafca4ceb2c768b1fe04e3402af SHA-1: bbc1521b27aa41ef9dd608c66177a69da4863d94 SHA-256: 9d2d44d5617167402cf9d208b74c3fc922afb841686e12b5ddf92204cd753dcb
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 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smidgel.ru/pbw?utm_term=how+do+i+pair+my+iphone+with+alexa PDF link annotation
    • https://puziwifatewir.weebly.com/uploads/1/3/4/7/134715637/pipusikureke-rareguxexowe-tuvesab-bidipedukalopu.pdfIn PDF document text
    • https://sigajijatikad.weebly.com/uploads/1/3/1/3/131379485/3817740.pdfIn PDF document text
    • https://jikevisanudopud.weebly.com/uploads/1/3/4/0/134017539/kotebimiwij_mugebimoves_rojigujimudi_pidewadinekus.pdfIn PDF document text
    • https://ditaxufuze.weebly.com/uploads/1/3/4/0/134040401/8368373.pdfIn PDF document text
    • https://bikekifo.weebly.com/uploads/1/3/5/3/135304891/2702900.pdfIn PDF document text
    • https://dasewukux.weebly.com/uploads/1/3/5/9/135956745/savodu_fokowekaxo_sifuxokiz_tanedagukuw.pdfIn PDF document text
    • https://vekosakebasagi.weebly.com/uploads/1/3/4/7/134743747/purumibu.pdfIn PDF document text
    • https://latebutaweba.weebly.com/uploads/1/3/4/3/134315799/5042382.pdfIn PDF document text
    • https://guvikaki.weebly.com/uploads/1/3/4/5/134519546/wisupagilufa.pdfIn PDF document text
    • https://vipekisurular.weebly.com/uploads/1/3/1/4/131453387/mejakojupaba.pdfIn PDF document text
    • https://bebibamo.weebly.com/uploads/1/3/1/4/131438385/fb766f7787cd4e.pdfIn PDF document text
    • https://tusutaxuwipafu.weebly.com/uploads/1/3/4/4/134403355/midat_padebeletup_nurakufiret_gusagen.pdfIn PDF document text
    • https://ramenenute.weebly.com/uploads/1/3/4/5/134591972/mebesolozepibi.pdfIn PDF document text
    • https://pureveruzidupuz.weebly.com/uploads/1/3/4/1/134108723/linejumek-wubidof-zedunizi.pdfIn PDF document text
    • https://didegesub.weebly.com/uploads/1/3/2/6/132681352/8734583.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/0f78d0bc-9f2b-4596-bfaf-9fb710f51b35/8405156210.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc187a30-db79-444c-ac89-29aebcfb096c/wudon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abfc426b-c571-4387-adf0-38e52b414e41/67075446520.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f434b9d8-ab42-40e0-8457-58be4d869d73/woveni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31c89aef-fb0f-4430-a8f2-219c0e17a778/electric_circuits_worksheets_with_answers_grade_9.pdfIn PDF document text
    • http://lururefisu.pbworks.com/f/vampire_diaries_book_box_set.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e265a70-5f02-4fd0-aa9f-69f4a6accb18/what_is_another_name_for_short_answer.pdfIn PDF document text
    • http://lururefisu.pbworks.com/f/worksheets_present_perfect.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4d3bb26-49a7-4e29-a123-2a6b1cda0245/what_is_the_best_food_for_my_border_collie_puppy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edd963f0-6364-4d47-bbd3-b0bd985f2abe/runutatozegikekuri.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_off0000f06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06A 5244 bytes
SHA-256: d51a6f2184c15b688d8aa9793c355fca75472f85cc721bf2680a07ee3869ce18
font_01_sfnt_off0001022e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022E 10844 bytes
SHA-256: ce694b4a3515b70817b81f707fed0ccccbcb6ab3f1f73edb5b540e06986e1a71

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