Malicious PDF — malware analysis report

Static analysis result for SHA-256 70c7179237eea4e1…

MALICIOUS

PDF

92.0 KB Created: 2021-07-14 04:59:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 379fb6664e6dd1865a5635f85b616667 SHA-1: 9c9b582084428950801b30e3e10360ead878cb5f SHA-256: 70c7179237eea4e12dc60a66e2a1817cc64d4211a23814ef518df782d286e23a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external sites, some of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm or phishing lure. The PDF's structure and embedded URIs are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://allytemp.ru/uplcv?utm_term=carbohydrates+in+mushrooms PDF link annotation
    • http://lagostena.it/userfiles/files/lukopis.pdfIn PDF document text
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/93114686295.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/48004199276.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/19388998161.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607b655f96f8e---xigez.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/14987929417.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/jijegubujeba.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/64762776560.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/ab9956756279129d6cf051268faf555f/ridaberopum.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/3109034540.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/51260504103.pdfIn PDF document text
    • http://prestopc.it/upload/file/sibenubenezoka.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e5483cb66---53392011068.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/nhnt4u2n443981lsif7bni2r3r/gusalomodegulozirofakev.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834d50220b3---gomarodegobuwula.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf2ea817615---kovagoripukoxikamisadorap.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072449c2ef68---lamobigowezojezedares.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d26c2e9092---tadoxakidupojelojuxan.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/3e9fd6057d6e0614b0bbc881e500a19a/58869540571.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16098883c2f6ad---86680625947.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/122300288033.pdfIn PDF document text
    • http://guyfamilyreunion.com/clients/41950/File/31613261453.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/91850875450.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/cd89f36b27419110cdf79bfe6cf5b958/78408707641.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_off00010322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10322 17340 bytes
SHA-256: 8c1850fe905c229e374cc21e76753ef453534bd1098660746bbc4d93cd6dcdbb
font_01_sfnt_off0001306c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1306C 10852 bytes
SHA-256: 350afc383d35ef338662d82aca1fa01b303b0cfbf94a9167e2eab5529e6dc082
font_02_sfnt_off00014959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14959 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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