Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9d057d918c6385e…

MALICIOUS

PDF

74.4 KB Created: 2021-03-22 14:55:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a84fbc3df33fa884b66771a9188cf33d SHA-1: 59ba06f48de6e2b258cdfec4617f3126c0cc4b7b SHA-256: f9d057d918c6385e4e3446071743bbfa16f35f909af504d3aab37d476ae0ff02
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9992

Heuristics 5

  • 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 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://lozipotod.ru/wix?keyword=stomp+pit+bikes+for+sale PDF link annotation
    • http://beririka.scienceontheweb.net/nuwuset.pdfIn PDF document text
    • http://vuzetasavuxoso.mygamesonline.org/15167625943.pdfIn PDF document text
    • http://motarojetox.sportsontheweb.net/71080649624.pdfIn PDF document text
    • http://nerazegizetikam.getenjoyment.net/widawogiwe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://geforagegi.atwebpages.com/tiwigiraxikunomagetagun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c0f29a1-5744-4621-9afe-e3e8e118764e/lotomadumirujitera.pdfIn PDF document text
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_e79b82d8ad414014a7af09049e739d82.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/07e42655-3fa3-4730-9faa-8861acc901df/vixakuwibomifavodoravog.pdfIn PDF document text
    • http://wadoromutisagar.myartsonline.com/64742062042.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_1391da0fae1c4e90b0694088f7387ce3.pdf?index=trueIn PDF document text
    • http://maxuluxusit.atwebpages.com/66336342303.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/ncert_notes_for_class_11_chemistry_chapter_2_download.pdfIn PDF document text
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_a36f157b1ef54ccc9004f933e735b688.pdf?index=trueIn PDF document text
    • http://miwewugewu.atwebpages.com/the_wonky_donkey_free_download.pdfIn PDF document text
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_dffe582f26da4d1dac7de3618219467d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6183600-c909-42c5-b4fe-1613e5d7b2d5/rogue_lawyer_review_new_york_times.pdfIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_4947855690744bba84ddbfb112724422.pdf?index=trueIn PDF document text
    • https://36071b1a-d853-4ad1-bccf-0ed894d94038.filesusr.com/ugd/906e9f_25e85a8928cb4b30bd089be4f558638c.pdf?index=trueIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_13055852c1944a2bad1a83efcaf5b29e.pdf?index=trueIn PDF document text
    • http://likewiwojuxus.atwebpages.com/bizigimusowiwavoxibipemu.pdfIn PDF document text
    • http://sanojepenot.onlinewebshop.net/moxesalibam.pdfIn PDF document text
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_640b36b59dc24a0c97160cb347108171.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/21dfa2be-9a71-49ca-b48f-69ca6886393b/49727161279.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_off0000e242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE242 5352 bytes
SHA-256: 14b9fc539764fb5593b886e1895ee3ec2e91e885180ba491c353d46d8081d9bc
font_01_sfnt_off0000f45d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45D 11580 bytes
SHA-256: 2170f957af7fcced7a42eb156fdab1595b4ac55ad7661a202e6505ec74971c1e

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