Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eaf3ff394c7afa9…

MALICIOUS

PDF

88.0 KB Created: 2021-03-25 10:32:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 04427ee106a3996a266b8798be960606 SHA-1: cc5a568f9805547c610f3d126fa9225a96572af0 SHA-256: 0eaf3ff394c7afa9ce3ec58b726f8a5c42f91017d23795c68e41ae890a19c90b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, suggesting it functions as a link farm. The primary purpose appears to be directing users to external sites, potentially for SEO manipulation or to host phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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=euripides+medea+pdf+t%25C3%25BCrk%25C3%25A7e PDF link annotation
    • https://cdn.sqhk.co/xororofomed/gfMdIRj/packpoint_travel_packing_list.pdfIn PDF document text
    • https://bufudelazevel.weebly.com/uploads/1/3/4/7/134734798/tajepopuwomojoz-takarupafel-nefananulaj-bewosoze.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/e2gf6sI/kapot.pdfIn PDF document text
    • https://cdn.sqhk.co/jozunufap/FgfBXns/59352920433.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481164/normal_6011121220b1e.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/jL1hahc/photo_light_meter_app_iphone.pdfIn PDF document text
    • https://wafiludelo.weebly.com/uploads/1/3/1/4/131437380/xavabigelif.pdfIn PDF document text
    • https://cdn.sqhk.co/sesakiwewe/JVHH3jb/sunovofurezexaxe.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/dNjjphb/teaching_strategies_gold_member_sign_in_my_account.pdfIn PDF document text
    • https://mepubigavij.weebly.com/uploads/1/3/4/5/134599646/c7f06e62d.pdfIn PDF document text
    • https://wunurobi.weebly.com/uploads/1/3/4/8/134881210/tanomosu.pdfIn PDF document text
    • https://cdn.sqhk.co/felolavap/Aqjd6po/teacher_aide_resume_template_australia.pdfIn PDF document text
    • http://vizilirudigub.getenjoyment.net/can_i_eat_eggs_on_an_anti-inflammatory_diet.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/dvjjkjj/xinemubuduponavisavebukug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500444/normal_6010033865781.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ab7cf82-f52e-4eb6-8dbe-cde6feb6626e/wovufozudavejajibesupemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7dced56-cbde-4d9e-95be-5245fd59701d/effective_practices_in_early_childhood_education_4th_edition.pdfIn PDF document text
    • http://zirutabu.myartsonline.com/jolopazuxomujifazamiwurov.pdfIn PDF document text
    • http://wegamaluperetuj.atwebpages.com/how_to_get_rid_of_a_rash_on_my_newborns_face.pdfIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/homemade_tree_stand_shooting_rest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a996c34-e3a8-4f1e-9373-6b678d37a13b/butewagukugiwo.pdfIn PDF document text
    • http://romofimor.onlinewebshop.net/27274527795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deba4f64-1eaa-4b51-892b-a1ba689f13da/a-level_biology_question_paper_paper_3_june_2018.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_off000116ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CA 5480 bytes
SHA-256: f6e92e68a246d8125bb014a0c2807b8fac6d730bfc46339c69225029597ebaf5
font_01_sfnt_off00012927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12927 12816 bytes
SHA-256: 49e9d97610803412da7aec90429531227f3b1b0ece191acddd73ebc066bdbe1a