Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bcc948a5fbff701…

MALICIOUS

PDF

77.2 KB Created: 2021-03-08 11:13:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 1d5f456add08c64c7f361e42312829b5 SHA-1: 4b4f905f36d7b07e1eaa954879b15d76266d9c9c SHA-256: 3bcc948a5fbff701a11222a25d36ada84fd9643c1a7cd44882b5eda72f65fd6f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation scheme. The embedded URLs are likely used to direct users to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/award?keyword=month+name+in+english+list+pdf PDF link annotation
    • https://jeduwisuduxib.weebly.com/uploads/1/3/1/4/131483356/rivuxuza_guwikabeluluv.pdfIn PDF document text
    • http://resokipuga.getenjoyment.net/dd_map_maker_reddit.pdfIn PDF document text
    • https://sofusetagiwubok.weebly.com/uploads/1/3/4/3/134320735/lovonixedelut_fudozisif_zavujafabofu_zozigama.pdfIn PDF document text
    • https://zuveravovizopow.weebly.com/uploads/1/3/0/9/130969477/jegal_kidetafu_judajo.pdfIn PDF document text
    • https://tetagusupawuwag.weebly.com/uploads/1/3/4/5/134586179/potaju-fujudugof-gokiwisixadux-babuluvosipavuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a82c121c-2200-4cd7-aff6-47cf910fdadb.filesusr.com/ugd/117c17_f708c3b22c4b466eba28e75a3c302293.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5082b37-d0f8-46a0-8b2c-67a4a370fe2a/41120209345.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/85102751791.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/free_invitation_templates_for_school_events.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f5b949c-5cbf-49ae-ba54-e95cec97f80d/how_to_put_fabric_softener_in_amana_washing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fd9722d-ca68-4ecf-b88c-e9549d2576ff/one_punch_man_garou_x_reader_angst.pdfIn PDF document text
    • http://tujotabupogi.rf.gd/propresenter_5_moving_backgrounds_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e595a88-1122-4f71-9385-56bdfdcd54dd/how_do_i_set_up_max_buzz.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/betileragitudelofesudi.pdfIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_3b4bf2350cea4a9fbd069425068e1e9e.pdf?index=trueIn PDF document text
    • http://metusajixano.epizy.com/bozusisegofonimabepovux.pdfIn PDF document text
    • http://duziroro.myartsonline.com/sony_fs5_mark_ii_price_in_hyderabad.pdfIn PDF document text
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_bc8f8d08267d49a4b432f7a8e1f725f0.pdf?index=trueIn PDF document text
    • https://20128683-61eb-4207-b985-d468b1a81fea.filesusr.com/ugd/0049ca_339a4a0a430d484a9a54cfb18e4c6ba0.pdf?index=trueIn PDF document text
    • http://fixafuxebiwi.rf.gd/ruruvoduxa.pdfIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_e1e40dc23269494eae68923f0e6c3f04.pdf?index=trueIn 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_off0000f071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF071 5364 bytes
SHA-256: 6cad531c088c5b16803b9928fe7f924f986dfe873faa658ab4d45ed530136e1b
font_01_sfnt_off0001029c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029C 10816 bytes
SHA-256: 088c0d8406cd5be5f9759cee17943c931e30b1feaed664ae3cfc24fe50b44130