Malicious PDF — malware analysis report

Static analysis result for SHA-256 eafab233ea9f5ab7…

MALICIOUS

PDF

80.5 KB Created: 2021-03-28 01:59:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 943a6a628cd91ce02fbdd7a76fa141ee SHA-1: f5a0434a476c4cdf19dde5fcd77135b62c81e9a3 SHA-256: eafab233ea9f5ab75d649488357c207d4f4922632d7a21de9b75d0f1b5353b98
186 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, containing numerous external links, with a significant number hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO manipulation. While no scripts were extracted, the presence of many external URLs suggests a redirection mechanism to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/wix?keyword=mitsushiba+verdict+golf+clubs+review PDF link annotation
    • http://bapatavusirave.mygamesonline.org/flaxseed_meal_recipes_vegan.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/what_does_chi_stand_for_hospital.pdfIn PDF document text
    • http://vixabaj.scienceontheweb.net/biotecnologia_ambiental.pdfIn PDF document text
    • http://judupebe.getenjoyment.net/53564845537.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://puzazodigeza.epizy.com/jepubilunojelebe.pdfIn PDF document text
    • http://xuxebaw.rf.gd/jinajuvadujimamadofapad.pdfIn PDF document text
    • https://6b137298-3864-41c5-aaa3-11744000c3c2.filesusr.com/ugd/b916f4_b3589e701a3b43cfbe7f58bacd593b08.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ad843b8-4fd3-4b9f-abc9-f97caa837e31/51195046672.pdfIn PDF document text
    • https://28a90398-13b1-4b58-b54c-ed045a6bddf2.filesusr.com/ugd/7e9e1f_28bb8b52d4834f169cf6cbed3c17b5c4.pdf?index=trueIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_c1f5b81638bf4968b3ebaca96e67d1fd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/39513510236.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/vivah_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/sugupidarimasifakot.pdfIn PDF document text
    • https://eff7b67d-fef5-45b7-bcd6-ffb1b71d3a14.filesusr.com/ugd/b4c9df_cbfacb80836749f0a84935af9fa64e80.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jusuberu/intelligent_gsm_alarm_system_g10_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/befakatexumo.pdfIn PDF document text
    • https://f4a80ce2-0a24-44e2-aff7-13c87a434ee9.filesusr.com/ugd/ace063_61e70e05f70745b997e3604bda5efb11.pdf?index=trueIn PDF document text
    • https://8d537faf-e869-4ed9-a29f-988560fab1dc.filesusr.com/ugd/0cce51_e479ec0f19ae4c7b81aa70bac043a970.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/34624377-e147-4311-b586-efa9b1234742/malatusajow.pdfIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_3b21729318684198aa8f6ed36258cd21.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/62f133d4-856a-43d5-94d7-f63592dc99b6/which_is_better_roku_premiere_or_amazon_fire_stick.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDC 5356 bytes
SHA-256: 9292e5e5b504ffb12788f705fa12d3d5aec5f5ec61b4fac8ab8e907df1e68384
font_01_sfnt_off0001003a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003A 11344 bytes
SHA-256: db24211d0579a937432c80290531c673867a61a8192a68cd11be3813dfa4b7b7
font_02_sfnt_off000126ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126AC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333