Malicious PDF — malware analysis report

Static analysis result for SHA-256 7372e6bd9d530b8c…

MALICIOUS

PDF

82.2 KB Created: 2021-03-04 22:43:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 320fa1948eec4df8fdc4517eedbe8a26 SHA-1: 1f9f776fa34c6e090c9fb9ce6f0ddc542eed78e8 SHA-256: 7372e6bd9d530b8cd90d01d72599a983d35291037d8347b6a12509b335da235c
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://midufefew.ru/wix?keyword=scope+of+supply+under+gst PDF link annotation
    • https://pilonalamajavex.weebly.com/uploads/1/3/1/1/131164122/7087681.pdfIn PDF document text
    • https://nixitemolepof.weebly.com/uploads/1/3/4/8/134870129/dezapenuse_fejaxirotig_mumidepabosulun.pdfIn PDF document text
    • https://pikulevixabokof.weebly.com/uploads/1/3/1/6/131606248/6822742.pdfIn PDF document text
    • https://furamakivagoj.weebly.com/uploads/1/3/0/8/130814247/vesovuv_babuzemawuziboz.pdfIn PDF document text
    • https://razijidepafex.weebly.com/uploads/1/3/4/8/134891772/492321.pdfIn PDF document text
    • http://sozimaxetupow.mywebcommunity.org/nubonidisozifajaneg.pdfIn PDF document text
    • https://galekogikelubem.weebly.com/uploads/1/3/1/4/131438025/refimazusiwizizuluz.pdfIn PDF document text
    • http://mixezitubut.mygamesonline.org/96331939376.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/89076058866.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/venn_diagram_math_problems_grade_7.pdfIn PDF document text
    • http://mukinumatonewo.getenjoyment.net/xurez.pdfIn PDF document text
    • https://bamutemo.weebly.com/uploads/1/3/2/6/132681362/borofi_zawumimit_pogevabomera_xabiwigaxajuda.pdfIn PDF document text
    • https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/dutigizu.pdfIn PDF document text
    • http://sagokorize.22web.org/cardinal_newman_school_sixth_form.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/tekibasesijetototenapibaj.pdfIn PDF document text
    • http://nebemor.mywebcommunity.org/dawuku.pdfIn PDF document text
    • https://kabuxezalexafa.weebly.com/uploads/1/3/0/8/130814122/dafubuvadid.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/what_is_infrared_foot_spa.pdfIn PDF document text
    • https://zokofefedepop.weebly.com/uploads/1/3/1/4/131437243/latalafikejo_bugoparimikile_vumukowudirode.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tokipobobanokab.rf.gd/alien_vs_predator_evolution_full_apk.pdfIn PDF document text
    • https://1ba6f066-89d4-4445-b8a9-08a6de046ef2.filesusr.com/ugd/d40554_4e8d38d127794599a6aa206c3efa5e04.pdf?index=trueIn PDF document text
    • https://7980b0ff-2efe-48f4-a442-6c87bca80713.filesusr.com/ugd/9bd8c3_16cc7c383e7248819f87057efe815a55.pdf?index=trueIn PDF document text
    • http://misugivunuzu.epizy.com/chirutha_audio_songs_free_naa_songs.pdfIn PDF document text
    • http://xafonabikox.rf.gd/32752341883.pdfIn PDF document text
    • https://1a441fb4-51dd-4528-a053-eb59ff664e18.filesusr.com/ugd/43d9d5_b9870e5c6b5e4fd080425ee1081be8f2.pdf?index=trueIn PDF document text
    • http://zuvemodu.rf.gd/bar_graph_questions_worksheet.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_off0001051c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051C 5316 bytes
SHA-256: 0bfd89e09b150c109b82b9d0bf50fe6d037e8caa406c9f2912090c273b1a8f4f
font_01_sfnt_off00011756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11756 10376 bytes
SHA-256: e1fe2710fc1f7fa3bb00c8cb966dabe6e9429694bd86ed7718212697e9366ca4