Malicious PDF — malware analysis report

Static analysis result for SHA-256 c07670ed5bef2392…

MALICIOUS

PDF

87.9 KB Created: 2021-09-22 11:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d1cebf952ca8d190da90e624f5ecb2f0 SHA-1: eb34231e37dac0d26cce3aa30b4b08e297f9f295 SHA-256: c07670ed5bef239225dc9eca1f8f022712920005fbab00e7430231867c0a3a0a
164 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs, many of which point to compromised WordPress upload directories or are part of a link farm hosted on disposable domains. The presence of these links suggests an attempt to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • 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 https://nomylo.ru/uplcv?utm_term=watchmaker+free+watch+faces PDF link annotation
    • http://palaciodelosnavas.com/userfiles/file/fobaroruzezademolopowuzas.pdfIn PDF document text
    • http://dataprint.ie/uploads/file/1024304497.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16134cc8145ad4---lolibolojawopepewi.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/3778300871.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/kujesusofem.pdfIn PDF document text
    • http://philipp-haberland.de/images/upload/file/24441453230.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16144dcca79ee2---86376549049.pdfIn PDF document text
    • https://lexcyberia.com/userfiles/files/97800627489.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/45035079580.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/mapatal.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/5pu536akolc9nv131vju4n645a/79169212712.pdfIn PDF document text
    • https://bela.geekers.tw/upload/file_folder/file/pupari.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/tofikonoj.pdfIn PDF document text
    • http://novena99.com/uploads/files/202109081653409086.pdfIn PDF document text
    • http://mirutte.com/newsfiles/files/fuxozosagozokut.pdfIn PDF document text
    • https://eghamatkade.com/basefile/eghamatkadecom/files/6706663759.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/098aac770b5f9338dd86d754397ee5b2/28192298674.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/jilinifexixutopunexodujak.pdfIn PDF document text
    • http://www.yeosung21.or.kr/ckfinder/userfiles/files/1630482673.pdfIn PDF document text
    • http://acelybio.com/upload/files/44718508712.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/59156485849.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161475cea7d2ef---vinejekerijuromogezudepe.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc2aa0d022---baparezumo.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_off0000eded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDED 10412 bytes
SHA-256: 32b227f767fc75ed1afc012bd00e5d78c6484472b3310dae387aac7d48c7a5ed
font_01_sfnt_off0001059d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059D 19972 bytes
SHA-256: 3e11769b463bc1a1a9955c49d82fe34212a53b801b3465f2b54fd3c88702c842
font_02_sfnt_off000139ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1