Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f2b6ab26e4cfa9a…

MALICIOUS

PDF

73.6 KB Created: 2021-09-16 10:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 75156e5baf65e58b17228318c1518f4f SHA-1: 3b87a3ceb1a13bbf4daaeaf98f78c2129638656e SHA-256: 1f2b6ab26e4cfa9a9dcd8958aa2fa1a28f6e0530e81033458cbeab1785bbca84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall structure point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://laureysnv.be/uploads/files/mekedikukuwupezawexijamon.pdf In PDF document text
    • https://viadagio.be/userfiles/file/vitilobojo.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/dagixosuvagifuzipugozulut.pdfIn PDF document text
    • https://presentkompaniet.com/img/content/file/fogaloxadasaruzonu.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/newaluzakovubip.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/24069535833.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/46a67202bd82c3d6431fb62ebe69d515/42920272811.pdfIn PDF document text
    • http://datcat.vn/2018/file/sesodel.pdfIn PDF document text
    • https://embassyinvietnam.com/webroot/img/files/87941366780.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7381745c2---ludakenomeluvamofusolal.pdfIn PDF document text
    • https://gogift-it.com/userfiles/files/8558609789.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/43016463527.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca9ccd1a4d---tapuzikaribulama.pdfIn PDF document text
    • http://tochalco.com/uploads/files/baduzasimafosoje.pdfIn PDF document text
    • http://magnumprint.ru/upload/files/vofebirilafepusulin.pdfIn PDF document text
    • https://satellietgroep.nl/userfiles/files/rotifuvulavovojugizid.pdfIn PDF document text
    • http://szm.hu/userfiles/file/56999592837.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/c350eb4324b2c6dd63c3771f19cc90f3/kamezufovafurum.pdfIn PDF document text
    • https://xn--80aesyq.xn--p1ai/files/file/33378009921.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/tawud.pdfIn PDF document text
    • https://speculatio.in/ci/userfiles/files/kugowosowitidupaxalab.pdfIn PDF document text
    • http://khocabien.com/uploads/files/dedilisitosu.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210910005204_pof5ee.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/50052837699.pdfIn PDF document text
    • http://dreamsurgerycn.com/ckupload/files/63917478679.pdfIn PDF document text
    • https://dlt-nkp.com/fileupload/file/59779233513.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=mobile+legends+diamond+hack+mod+apkPDF 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_off0000bd4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD561 16744 bytes
SHA-256: a986551907fbe0fc46eda9f3d1f5207f1ce803da3c203cef7ed163cd447686d8
font_02_sfnt_off00010033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10033 10988 bytes
SHA-256: 42bc8bb1b69202a53124169e56937c9dacf1b0ad3b5695cddab1697e535df06a