Malicious PDF — malware analysis report

Static analysis result for SHA-256 127672cadd2c18a2…

MALICIOUS

PDF

89.7 KB Created: 2021-09-06 01:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c35ca6c1cf40abe258bacaec9c5ba960 SHA-1: 03a3c7f9023bce00215e7124b3439b00b0c8635e SHA-256: 127672cadd2c18a2ad4824e6b36e2599141d9330e6b60ceb21f8abb4cf6c0871
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The heuristics indicate it contains a link farm pointing to various PDF files hosted on potentially compromised or disposable domains, and it exhibits callback phishing lures. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to direct users to malicious content or engage them via phone, likely for financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://wastran.ru/uplcv?utm_term=reiner+sct+timecard+manual PDF link annotation
    • http://www.lugashotel.com/data/editorfile/36348379206.pdfIn PDF document text
    • https://aedwea.com/upload/foto/40585372166.pdfIn PDF document text
    • http://capitalclassof1971.com/clients/4/4c/4c1e4f015ba9b8bec237dc1ca705466d/File/99869441439.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/12628766408.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075aa5a3b4a7---57404983197.pdfIn PDF document text
    • http://fotossc.pl/_files/file/gedojib.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/51550715986.pdfIn PDF document text
    • https://thegioibaobicarton.com/Images_upload/files/kigivolifuxogirifon.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/linokevine.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e91f56116a2---7524607284.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/15675817383.pdfIn PDF document text
    • http://geostudio.eu/userfiles/files/karux.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/mhto7bacosdia0jn9a09j9ppn6/mujotufetixi.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/se59qbb9e6sshrofjosh7rc747/44434853994.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/bunabusevitareromim.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/malufokifuvikevaxixijate.pdfIn PDF document text
    • https://marblo.ph/app/webroot/img/files/nifepap.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e80d0a85d---kofoziwuwapizoronarewezor.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/0a9ce3cf6073c21b9f45191ec5698757/51123003722.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16072be38dc55c---jumojupaxozegazozamumoviv.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/dupodonolutogomaxum.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/510f566fc9afde56f637e23090bafd8a/fifikedixa.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/dolibep.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdf110aa16---34424152064.pdfIn PDF document text
    • http://garystrike.com/clients/3/30/301ae0ed988f9237e4cb8f8c41f6cb36/File/goxufari.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_off0000f949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF949 10556 bytes
SHA-256: cc151505233f34cbd59919c00731c7b75a3a777f5af4fe859009b73244b40776
font_01_sfnt_off0001114d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114D 18212 bytes
SHA-256: 081dfb681f185a040fa5bf9405c8d2d488f944bb1c6ee066650d839aa0356809
font_02_sfnt_off0001417a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1417A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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