Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfdd3128b34b1005…

MALICIOUS

PDF

83.1 KB Created: 2021-09-04 00:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 7205e73356ef6e6bde07cb4e0f517829 SHA-1: 1b0baac9513f5d1a906748b211b89f8b8c7ff3c5 SHA-256: bfdd3128b34b100578b2c020a46b3b72aa1692bcc3b6fe435af01cae59245872
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised websites and link farms, suggesting it is used to redirect users to malicious content. The presence of these links and the nature of the heuristics indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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://allytemp.ru/uplcv?utm_term=divisibility+rules+worksheet+for+5th+grade PDF link annotation
    • http://xn--rssx31a7tec6p.com/upload/userfiles/files/20210702075753.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/c20fdce85039b2c197002830fdecb100/50843912584.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/kiveviluwejiriganuvezuruv.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a039e51c5---tajelekok.pdfIn PDF document text
    • http://udelimpa.es/ckfinder/userfiles/files/meremesoxiwezazusu.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160868b6a1c614---85125950754.pdfIn PDF document text
    • http://wedooverseas.com/userfiles/file/37057787743.pdfIn PDF document text
    • https://abyway.lv/images/ck_images/files/karipafokilifuvinunafi.pdfIn PDF document text
    • http://industrialdevices.in/uploads/timave.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/80111808085.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/705a2651d25e31c4bbe580db46eb72c3/23612733279.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/819e1faf96245038233d1f7d7b8b660b/zuvavorokefewarazirileta.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/5c8aa5e2caae3206500ac63203002358/69745134462.pdfIn PDF document text
    • https://pmms-online.com/assets/file/3307404041.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021082208483473499.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/zoxefi.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/13493bccd683497b14794513f77c29d1/17690644339.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/6adc43cf4a081855a34087639dbfa5d9/xawaxefopani.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/ece0cab6150ae1d63ebf31cb041f2784/73328612778.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/mobogedebaxusomu.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/depubexifogirozuxaz.pdfIn PDF document text
    • https://dongcohonda.com/userfiles/file/51767108961.pdfIn PDF document text
    • https://sapporopools.com/contents//files/meneditosiwakebo.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/a61ee3d44862b1270ca923a8838da298/40723330691.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607989584bdf5---dowomifetagikodo.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_off0000dc43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC43 11264 bytes
SHA-256: 8e467bb244fc2b094c07c13d809dc8ed88408c106ba0711ca16f199b40d5a19f
font_01_sfnt_off0000f6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C8 18232 bytes
SHA-256: 9d1aad128f403ebeb9a4e290cad4a6bd01b68dafe29a77146a2f279592d38ba5
font_02_sfnt_off00012697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12697 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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