Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed7c4d09dfa73fd…

MALICIOUS

PDF

79.7 KB Created: 2021-03-17 04:37:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7ba9e3e03cc81091d96a65ec7d983ea6 SHA-1: 22ec8bdb21cb4d2753286698bd026b759970d9a3 SHA-256: 1ed7c4d09dfa73fd47d65d526e153f7dae24a54f3370cb31aacf073196fd57cd
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 0.9993

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://xajibur.ru/wix?keyword=piedmont+region+of+georgia+location PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474445/normal_5fda8f672fd4d.pdfIn PDF document text
    • http://fofolep.mywebcommunity.org/15075599653.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451737/normal_603f6a939781b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465388/normal_601de5fcd3d2f.pdfIn PDF document text
    • http://neviresutuv.iblogger.org/gigexomuwiwaxafodokawij.pdfIn PDF document text
    • http://tetiviguxawik.getenjoyment.net/porunonisugazaw.pdfIn PDF document text
    • http://xijipeva.mypressonline.com/handwriting_without_tears_letter_formation_cues.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vexabimumemig.atwebpages.com/how_much_does_a_fisher_wood_stove_cost_to_have.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/332e3d51-eb58-4a23-ae20-a18d251f29d3/26544415813.pdfIn PDF document text
    • https://0ea28b16-58c2-472d-b6be-3e97fe9b7bb6.filesusr.com/ugd/696b8a_e87a28d9228346fab6abcbec30639340.pdf?index=trueIn PDF document text
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_01c1e457b4c043ea9c8f61a34421ff9e.pdf?index=trueIn PDF document text
    • http://wakafovoda.epizy.com/how_to_make_vinyl_stickers_cricut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10bdbc60-a27f-4b76-a961-b982db49e0e4/95412553110.pdfIn PDF document text
    • http://wubixulazig.rf.gd/free_loan_agreement_template_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d84455-8882-451f-bfb6-3d65fa0a09f4/los_juegos_del_hambre_sinsajo_parte_1_online_cuevana.pdfIn PDF document text
    • https://e2a12503-e9f4-4898-9b1e-00959bf5a9c8.filesusr.com/ugd/1f0de7_91b29bfaae294098aa9ec464375b73e8.pdf?index=trueIn PDF document text
    • http://lapetagalelan.myartsonline.com/59056197072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02e1d4c4-e3b1-40b0-b5ca-7aea339d79d0/uk_theory_test_price.pdfIn PDF document text
    • http://jifigazanovew.epizy.com/22871097758.pdfIn PDF document text
    • https://34886cf3-15ed-44db-93e8-8979dc7c4cd7.filesusr.com/ugd/ea2c45_e5c4c15aa3654c078b527fd27b6d3fbe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/75bb7bbb-f2da-4a47-84f2-500784ff5100/passive_optical_local_area_network_definition.pdfIn PDF document text
    • http://taxupot.rf.gd/zazizig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51790be6-972a-4c0e-98d9-3e4ea9774709/coleman_6v_rechargeable_battery_pack_not_charging.pdfIn PDF document text
    • https://0926596c-b1e6-4473-87d6-fed2e709bfeb.filesusr.com/ugd/e2a635_96da67552b8c4325bb287ad794f530cd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/82320b93-84bd-4de1-9b29-f4797768da08/samsung_hw-e450_soundbar_and_wireless_subwoofer.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_off0000facb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACB 5164 bytes
SHA-256: afdd5676b3fb060c8ca84a803d15aa7933a26b54649756c852858a7b6b9a2875
font_01_sfnt_off00010c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C48 10852 bytes
SHA-256: f577a6f7bb8276e79312307d01c82bfca5af2737151d689480be4336fb51de60