Malicious PDF — malware analysis report

Static analysis result for SHA-256 0588d5fce1ea354e…

MALICIOUS

PDF

87.5 KB Created: 2021-08-02 15:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: eda9030097b118964a9534fdfe9b9211 SHA-1: 6abf869c581ae77282689997454c7235325d13ff SHA-256: 0588d5fce1ea354ef86f9ef69f5f743558a0ac44c07a4ebff885636d292cee16
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous compromised WordPress sites and disposable hosting, likely to distribute malware or facilitate phishing. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, potentially leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/06eca243a25745a155552fff5a83437b/45918098926.pdf In PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/8b5c26c76cb440f8fe430d051bfe3297/zerapenekexutaz.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/7307b4a786e1df2cc462fb1df9fe82ce/9156778666.pdfIn PDF document text
    • https://vnsteeldetailing.com/UserFiles/files/87562482113.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a7ad219737e---3507930121.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/obl33n4k8nc33l3kpfn9oe1s0d/lovebesepixuk.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/juxumisel.pdfIn PDF document text
    • http://jentretiens.ch/uploadimage/85300197281.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607933817fc6f---jokopogufoxoteretuxuxuka.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/27382795197.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5abfd0f4e5---fegop.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/15172840464.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/wijukatiso.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2de6dd77e---77702054178.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/ragamog.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/70demlg7mbgk4lph62mqj6hv01/49370824205.pdfIn PDF document text
    • https://eucolait.eu/userfiles/files/12390576597.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/5648310539.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/rinixe.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160be4db219977---43315036175.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607099098a16b---22649744616.pdfIn PDF document text
    • https://chris-arnold.com/userfiles/file/57236056736.pdfIn PDF document text
    • http://ok-poland.com/userfiles/file/zisubarimamevekotoxowudes.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9cd82fb2e---wefifeduvenodaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+to+teach+formal+and+informal+languagePDF 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_off0000f2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AC 17152 bytes
SHA-256: 4c7fe200589d87d7f3739a5bd7cf313bac3bf1151ef9c3ee8293a86849cfeb55
font_01_sfnt_off00011f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F24 10932 bytes
SHA-256: cb77f5edc0100ce18635a3173744b83538a8cadf4e365949de02fcebd50c2d7c
font_02_sfnt_off0001380f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1380F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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