Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea6a90c17c12ae2f…

MALICIOUS

PDF

83.5 KB Created: 2021-09-01 10:10:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 58f8cf3cba1440389018f8c5fe44b756 SHA-1: aa3fa60ea9595fe9a9003f2dd113913ed97d5fd8 SHA-256: ea6a90c17c12ae2ffebf9c38d7dc4bc36b591615547c439cf63c0c9a7daa00f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms on disposable hosting indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=cash+operating+expenses PDF link annotation
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/bkh0sec8tmut9trukps8prpod1/zimesijuvagimagagewalijaw.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/36529101370.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/85ef6cfc41c814de094c2084265cf381/vadapifigevomowilaxavis.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a157e4e6732---43737566258.pdfIn PDF document text
    • http://cn-daomeng.com/upload/userfiles/files/0ccf6b9f390bc9eb991bc604457fc623.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210528054718653.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/53k5if076670233vhe77q6tg9i/62085889455.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/83698355132.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/29334929323.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae35724b24---japidedosumepedesuvewakip.pdfIn PDF document text
    • https://nhahangbienhaitien.com/uploads/files/61165233910.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/de328bb56d0f3e6034dd28bf5da7570f/1881081960.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/tikajixukuluwavil.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/558cb16effe449da80d0fe706c36a167/73666833589.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a20d7babb9f---pazajaxajolipip.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/turerebopazudilotupabi.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1610d391e44d02---20632952586.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/65297489935.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cc2f8f6619c6453d74152cdbf9e79af6/nafunejoxi.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b410db66353---56499105214.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/39b306774a1ff5d4b02f066cf27a0e4b/36843655139.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f69857a15---fadodogonex.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/weful.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_off0000e03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03F 18380 bytes
SHA-256: 57d3f45d3838a1caa861b83dea5c7ab5f750ce6be1929b100e0edb1341519fca
font_01_sfnt_off00011013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11013 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001282a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282A 10616 bytes
SHA-256: 4ed3f91201f26183465911f117e03195856e2ef5b2ac1dd859e28a64a38a9a4c

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