Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b5b5faea7ad2407…

MALICIOUS

PDF

78.5 KB Created: 2021-03-16 03:37:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 006342bd594295e163e2d386be45463a SHA-1: 40fae83f81f54c4cd5b8800c2ea38d56ee741191 SHA-256: 1b5b5faea7ad2407ada151c4ecd75d46820625b80ebccfef136c40f53919eca9
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting an attempt to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://dugedepap.ru/award?keyword=aircraft+engine+design+third+edition+pdf PDF link annotation
    • https://fafefojesuvun.weebly.com/uploads/1/3/4/6/134651362/3e179f4d31.pdfIn PDF document text
    • https://dodoluwateja.weebly.com/uploads/1/3/1/3/131381806/rifizolimun-zudikesazaz-jobag.pdfIn PDF document text
    • http://xuzerujagojagip.scienceontheweb.net/automatic_control_systems_8th_ed.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/bimitaxatosofetedazarusox.pdfIn PDF document text
    • https://xumuxurubaxuk.weebly.com/uploads/1/3/4/5/134501003/6418371.pdfIn PDF document text
    • http://pirunumilusarib.sportsontheweb.net/lg_washing_machine_0e_error.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/8beaeb2b-1067-4193-8727-7287d4b87ecb/john_deere_42_mower_deck_mulching_blades.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18f68506-17b6-4a84-9905-7069ff04b7a7/20676984071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/521d0cb9-9a87-47a3-a2cd-b263e0ab7088/varizerekuxesodovibuje.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/nazogadupukizukewabinuf.pdfIn PDF document text
    • http://gukupexokopiwug.epizy.com/32757707972.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/ecco_guidelines_crohn_s_disease_2017.pdfIn PDF document text
    • https://2b81f3f0-3f46-42ff-87a7-5865dd96cd3c.filesusr.com/ugd/fb41f9_013392d1f8464e638d587e763005c5b2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/the_chronicles_of_narnia_full_movie_in_hindi_watch_online_free.pdfIn PDF document text
    • http://pagupugizof.epizy.com/chala_head_chala_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/40295467829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4b6dbda-6388-47b3-bb2b-3ff01a6cbff2/taking_sides_clashing_views_in_world_politics_18th_edition.pdfIn PDF document text
    • https://2e5cbe44-7de3-4e3f-b94c-8a8567814465.filesusr.com/ugd/f96b02_e7d1a95867d6458587bafffb20a79f5c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/80547021895.pdfIn PDF document text
    • http://pikusotanuw.rf.gd/18641789951.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_off0000f561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF561 5372 bytes
SHA-256: 70373cea12e4dd79b487c3e5042f23631eec47525bb4020ea1525011de8ec774
font_01_sfnt_off000107a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A7 10768 bytes
SHA-256: 5067d4d3ac44bbb9e193557134c557ae63037dc20fbbcc4de2ff0229aff4884a

Open this report in the interactive analyzer, or submit your own file for analysis.