Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd07085c08df8b9…

MALICIOUS

PDF

73.3 KB Created: 2021-09-19 04:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c86355be0b1f9ccee6c7a2f7a9dc3224 SHA-1: 20be1a61ffb459b27f53eb99a831547e614a9dd4 SHA-256: 0bd07085c08df8b9e8a0ed81dcc00bdf60fa3dd7c36c0c3856afd48d59af2a12
196 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. The presence of numerous external URLs, many hosted on compromised CMS platforms or disposable domains, suggests an attempt to distribute malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely provides instructions for accessing a password-protected archive, a common tactic to evade initial security scans.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://coretry.ru/uplcv?utm_term=psp+games+iso+free+download PDF link annotation
    • http://rpsbchamber.org/editorData/file/79245864538.pdfIn PDF document text
    • https://danielfelber.ch/userfiles/file/rajuvusowimifatoxos.pdfIn PDF document text
    • https://globalcircle.club/userfiles/file/65024017951.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/13223968000.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161384212343af---74625240366.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/74764242937.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/e098ae5ce478a6495b1c8880749f7462/ligegidipowatanenikodu.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/lodirizuzarumosurumim.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/66386501033.pdfIn PDF document text
    • https://hotelreviewreserve.com/basefile/hotelreviewreservecom/files/jubadatebalemijokukigova.pdfIn PDF document text
    • http://abc-tel.ru/data/File/56404800898.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/10466421499.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/704b3f0add0e8758dc62d871c81b6bcc/lazurinamofifega.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/xudunufivusexozexi.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/26657730232.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/vesusofubipibonewopujib.pdfIn PDF document text
    • http://thuannam.com/image/files/28074418375.pdfIn PDF document text
    • http://vwtint.com/userData/board/file/88598389926.pdfIn PDF document text
    • https://qatarsecurityservices.com/public_html/userfiles/file/gazobetumumagejorosisapi.pdfIn PDF document text
    • http://wwm-quanta.com/upload/files/84503179798.pdfIn PDF document text
    • http://finance-bulldog.cz/UserFiles/File/wegapewowimasoderetelo.pdfIn PDF document text
    • http://giaydantuongphongkhach.net/images/news/file/xekoji.pdfIn PDF document text
    • https://sportuna.be/ckfinder/userfiles/files/68503116016.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/kka4mdtc68c9dp3h583uvdp4k1/zakimejimegonalixu.pdfIn PDF document text
    • http://idevicesplus.nl/app/webroot/files/userfiles/files/lulawasizofosaxinimagatif.pdfIn PDF document text
    • http://torby.kbo.pl/ckfinder/userfiles/files/kupavuzasimemogibex.pdfIn PDF document text
    • https://dodatnagarancija.com/userfiles/file/godabajaz.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE0D 10828 bytes
SHA-256: df28cf4161a462c1baba564def076af6599483ec3de63170313c06d42d46fe47
font_01_sfnt_off0000d6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE9 15844 bytes
SHA-256: 4acd392dfadd22a0b421af7bc414c467536211890b5f580821f01152d23ec8ee

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