Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0dd0ef1fc288b5a…

MALICIOUS

PDF

93.2 KB Created: 2021-07-20 01:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 98e5fdb4a645f3292433399d8f4fd135 SHA-1: 5ee3f35e4fe4ebb0f54ffe91931961a25522e10c SHA-256: a0dd0ef1fc288b5a9cf298d93f12001d6a1a102480a39558227b7f00f9ebeca3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious redirection tactics.

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 http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee3d9610fe---vezusorowutogaku.pdf In PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/ucdeerb2bub1tddc0turkru113/seziduxabenoxavotizurome.pdfIn PDF document text
    • https://soechi.id/userfiles/file/gulavopisulebovo.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/jorofo.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e405229f2---dixuwepogeri.pdfIn PDF document text
    • http://land89.com/ckupload/files/gozumoxiwebowipagopoxom.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d8c415c9f---94473212118.pdfIn PDF document text
    • http://computerdoki.hu/user/file/magegiweledut.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a14cbc45d22---folemofoko.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/gorijovatidoduwujik.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/143fe2d0ccf93e57306a1d23d11db525/xamezaxetepi.pdfIn PDF document text
    • http://mistralizmiryonetim.com/uploads/file/58389975118.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081db7cce503---91913337057.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/zatizuzeponuke.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/e6533d4fa1d539c7d2d770756b30543c/dumimadutiru.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/pebatenojutexupinitaza.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/8237622207986c850f3b66f86786700e/19915612701.pdfIn PDF document text
    • https://slide-bearing.com/d/files/jalegaxisikexaf.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd64c526d0e---tosatuzagol.pdfIn PDF document text
    • http://inse.us/uploads/images//files/pedimegajivepimusedonaduz.pdfIn PDF document text
    • http://air-ned.com/uploads/files/5480857211.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/ivno700l2bf0m7vorjff8g8tb7/wezuzijexeko.pdfIn PDF document text
    • http://chongros.com/userData/board/file/mapoxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=interview+questions+with+answers+for+experiencedPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001072b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072B 17636 bytes
SHA-256: aa821a3da4a716954fca90f4dcc473d1404a030ac9ab9a5c2a2e3943b4418e6e
font_01_sfnt_off000135a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135A1 11120 bytes
SHA-256: 7bc27f88d90aa3406e11f9b370ae0db674152232e4a196f5c566061d45d333eb
font_02_sfnt_off00014f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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