Malicious PDF — malware analysis report

Static analysis result for SHA-256 699f42f3595d8c07…

MALICIOUS

PDF

136.1 KB Created: 2021-07-04 10:53:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 13cabafb37d7fdda4779cceaf86a90de SHA-1: 02b1990d9eba093455b423b392d79831863c9b25 SHA-256: 699f42f3595d8c079b1c9745a87df934ef447af940bc5003331f40c607351723
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Internal Spearphishing

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It impersonates the brand 'Apple' and uses a link farm on compromised CMS uploads to direct users to a credential phishing lure. The embedded URLs and the nature of the heuristics strongly suggest this PDF is part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+stream+on+steam.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c34b070be46---wepuvadujuzegiruzatafo.pdf In PDF document text
    • https://yenhuy.vn/upload/files/nodajipiwaxijix.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/922663d33b285de617be549d8bf35c4a/xewowemaropofinifuxat.pdfIn PDF document text
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/27878963979.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/69544346710.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160af9d2d086a5---xojivorarakuvesatubafim.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/banorodirarikizunimerar.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160baed565d2f1---wajegonugox.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/95643699060.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/7a48bb5f7f20e6c94e412ad0eaec57c7/bomesogonemotebonezezavij.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160910082486a0---kejabixepiwidijosekerixu.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/f4271992f44d4290281c19c4a28cdeb6/7449759017.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/48123544816.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/37105933973.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b25c5c8d966---48918595263.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/xelutomiluxazutedafovuz.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/jopum.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/nupozefonilamed.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/kikefosikifuzijej.pdfIn PDF document text
    • http://carsongrad75.com/clients/3/35/35717660c32d3dd9b0ffde8f33a19d23/File/77151633352.pdfIn PDF document text
    • http://iwishop.hu/file/redekawuramivetiko.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1608f420020695---zigususoxidexefogaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+stream+on+steamPDF link annotation
    • 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_off0001b685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B685 10208 bytes
SHA-256: c803351b26ca0097224358c8700ab21cf05c9a271575d9bdff601f066c651b7a
font_01_sfnt_off0001cd72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001e584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E584 17616 bytes
SHA-256: d1006d314376b6d09b9f75eb777b8014448ba456b9287f09cc909a6d713743af