Malicious PDF — malware analysis report

Static analysis result for SHA-256 c44f114f6d406322…

MALICIOUS

PDF

83.8 KB Created: 2021-09-02 04:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e0aea3f1d9c72327e91e4f762ba3130c SHA-1: 781937bfc8848c540be0914292826aefaef2cb78 SHA-256: c44f114f6d4063220892699ccc8ddb6d2e6068d979e6feb5b57987037fee9277
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://catamma.ru/uplcv?utm_term=area+code+313+map PDF link annotation
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/96b9956f7ac3dae3d27b3836e41624e3/20740290732.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160b299ddcaa36---zofapokevetogifovibuzuwaf.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607735c276cd8---fesamupul.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021050806540473499.pdfIn PDF document text
    • http://agiteam.org/clients/b/b0/b0c4817036ef1cb73596cc935f3fa86d/File/mugafe.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f90a189defe---wotujowamitapazozeraj.pdfIn PDF document text
    • http://zdravi-kromeriz.cz/files/file/93097085231.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ffd71b7a76---relazi.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb55e77eef7---3439845467.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/22654784726.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/91637169912.pdfIn PDF document text
    • http://kopdesign.nl/userfiles/file/zezodobejanozawamulimukar.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1612b5a4e31ffd---zesixunaw.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612eddd36f811---37523351420.pdfIn PDF document text
    • https://scriptdd.com/_file/file/tejawix.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/rezokujex.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c967935e36a---tobotaromaseleno.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/8007bf2eddf9d149eb152ea1a06693a6/85502796811.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/25145d6fcb8b0c0fad4e24fdc4c03694/26097867519.pdfIn PDF document text
    • http://pepinieres-soupe.com/userfiles/file/fakamexavevi.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b621c9b6487---jimoliberimomenoloxajizu.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/69061254753.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/gukrcqpdmko0nrtqarfjmkf7ku/zikubaripekalakumov.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/cj7922hsphvgd7tc2oc0v6ldse/11476438678.pdfIn PDF document text
    • https://kindeeyudee.com/ck_files/files/48923054607.pdfIn PDF document text
    • http://cuacuonanbinh.com/userfiles/file/jukovijosogikusu.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///jefalizopubotilutelo.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_off0000e29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB6 10372 bytes
SHA-256: 00d7bf77b3d4dc57e0efe9f569d6ae5031226afb1c5fc709909b642eebc515af
font_02_sfnt_off00011237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11237 17888 bytes
SHA-256: 8e8096d4f56b8f064b62540ad98a0e41cfb933a382bdbe022ff17fdf74f4f9c2

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