Malicious PDF — malware analysis report

Static analysis result for SHA-256 720769dfd7556fc8…

MALICIOUS

PDF

89.7 KB Created: 2021-08-20 22:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f4927ebd5501fecec1ce0d9440e91bb5 SHA-1: 5631a2441135ee8c811029f59a95ecf58b12004c SHA-256: 720769dfd7556fc851a8fd4328a32102ed99abf2f905dacd44495156b0757230
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content or phishing pages. The presence of these links and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pixomot.ru/uplcv?utm_term=auto+train+cost+for+car PDF link annotation
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607063f986a08---55920780549.pdfIn PDF document text
    • http://megalaserasia.com/upload///witigobelosazibusiwi.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/2e6bb72f004c20a003ab5ae1b6b93f74/44454771277.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607843c2c3652---60733928167.pdfIn PDF document text
    • https://www.ijmsir.com/ckfinder/userfiles/files/rusunujutekuzinepiwug.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/92a394017d959aad87cc682d55d46ddc/38672193995.pdfIn PDF document text
    • http://charivne.info/images/file/59029781455.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/0d5501b9226098ba84326c521f3939bc/33790162692.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/daruzepulenuzag.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/8d2b66b6b9f2a7054ff7c11e6fc28735/joxes.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160735acbbface---wifawupalovugosuxali.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210610_ADCD70B2DF405E0A.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/sigulawaxarapewomoxe.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/zajumimelibawage.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/25309270390.pdfIn PDF document text
    • https://soechi.id/userfiles/file/lufujatalamagowuso.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abb0738fa93---67687955800.pdfIn PDF document text
    • https://biocoils.com/img/file/sosoxase.pdfIn PDF document text
    • http://satisfytech.com/ck/upload/files/15975673859.pdfIn PDF document text
    • https://12shio1.com/contents/files/gubimi.pdfIn PDF document text
    • http://vietsaovang.com/uploads/userfiles/file/72462260420.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a11a33a3921---nebifodisuxeretatinumur.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_off0000fc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7C 16660 bytes
SHA-256: ed4e17bb88d2f86d3fea1946c6edb4954e556606d7561a47ac69c8cb3ef343d1
font_01_sfnt_off000127c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C1 10232 bytes
SHA-256: 8a278bbf20f8bd8527b4bd21dc92f809cb0f15b3adbd83883083f5ec3885ab7a
font_02_sfnt_off00013ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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