Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d7ddcd56db4f1e…

MALICIOUS

PDF

83.4 KB Created: 2021-03-28 13:38:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b55c541e4acbf8dca67f997f83c67e06 SHA-1: 2ee46663b70918f072124b56cb58b47b4982e482 SHA-256: 14d7ddcd56db4f1ec14c6803507f7eda866d972fbf4a3f7aaa4f9e1a8a59cacd
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly suggests maliciousness. The embedded URLs likely lead to further malicious content 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://jacksth.ru/wix?keyword=the+miracle+worker+study+guide PDF link annotation
    • http://botanilix.mygamesonline.org/wowek.pdfIn PDF document text
    • http://kikifikoxije.mypressonline.com/arduino_uno_projects_for_beginners_with_code.pdfIn PDF document text
    • http://savupubib.22web.org/bebe_rexha_meant_to_be_music.pdfIn PDF document text
    • http://gidonuvawugirid.medianewsonline.com/54540165976.pdfIn PDF document text
    • http://neritam.22web.org/que_es_anlisis_foda.pdfIn PDF document text
    • http://kumululurug.scienceontheweb.net/bezonufenomosez.pdfIn PDF document text
    • http://zijixiteluwek.scienceontheweb.net/metamorphosis_by_franz_kafka_quotes.pdfIn PDF document text
    • http://kofodotig.sportsontheweb.net/is_lord_of_the_flies_suitable_for_a_10_year_old.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bff5fdab-9fd0-4670-908b-a1308bb5a9cb.filesusr.com/ugd/227d0f_70c13347c3484418b1c56715eeacc4f9.pdf?index=trueIn PDF document text
    • https://9a86171b-24d8-4f43-8717-687e75280c8f.filesusr.com/ugd/6234e8_07e00b4401f34b548d43481c377f3592.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/383556a8-1854-43cd-b030-99a375185139/how_to_connect_tp_link_wifi_extender_without_wps_button.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1762761e-b577-4efe-8df0-10e635fd03fd/kewekozama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/719eacf1-1c4f-4916-b37f-51166c960efd/54396808026.pdfIn PDF document text
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_d72624a27b9a4d50948843a2885b3a94.pdf?index=trueIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_775025bfe8b3421585d9469be15d1644.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/375d7856-8ca2-4605-bc61-3e93e1896a99/how_to_change_trimmer_blade.pdfIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_a68017d03e534e08a1b958873a9510f1.pdf?index=trueIn PDF document text
    • https://6b137298-3864-41c5-aaa3-11744000c3c2.filesusr.com/ugd/b916f4_26983b9893804bc8bf30676acae6b0cc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f22e618-3253-465e-b4c5-3875bd9c32ad/dell_optiplex_790_memory_upgrade.pdfIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_d5480e68aa5f44bcba90dc562fd1470e.pdf?index=trueIn PDF document text
    • https://8de17e8c-b43d-4143-985d-773a0aa332b1.filesusr.com/ugd/01f6ad_8211735a80d24e40821eeea1d818f48f.pdf?index=trueIn PDF document text
    • http://zitegarapopufis.rf.gd/how_to_program_ge_light_switch_timer.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_off00010571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10571 5560 bytes
SHA-256: a0da5c01b7c04fbdc08a76cc68906d66917310de1b0f694c428aaa72ece203ff
font_01_sfnt_off00011844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11844 12008 bytes
SHA-256: 3d1a3df75112ecea6451b59e3a1c81cdebf89562a8ec734368d70a76989ae343