Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5a9326c4438944…

MALICIOUS

PDF

97.2 KB Created: 2021-06-29 01:20:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 46bf87ca763eaa34b91afc7071675e73 SHA-1: f3dfde03418d5b251ae940a6ff7515dac524e0d9 SHA-256: be5a9326c44389443d2c88ae43813a1418d993164233f3f8e65e65124c0d955e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many of which appear to be hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, but the presence of embedded URLs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://inwebjor.ru/uplcv?utm_term=metrical+romance+narrative+poetry
    • http://handbook.hu/upload/page/file/25101363935.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/o63cipaepokn1a6f21i4rp4of0/wajowarizosafegumotabur.pdf
    • http://northstarbaptisttyler.com/clients/a/a4/a4b4c2e389351fb2dee96c3f727c6a57/File/90958829842.pdf
    • http://allamericannursing.com/userfiles/file/31394226274.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5e956e42c---67301534849.pdf
    • http://baaningdoi.com/file_media/file_image/file/71944722061.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a9714660cde---21025110160.pdf
    • http://rauvuonsach.com/images/uploads/files/78860252287.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/pabqhforurn7b4jd2fjrb3lasd/dunalosegarolojat.pdf
    • http://cs-web-design.de/ablage/userfiles/files/97461334561.pdf
    • http://berallebags.com/UploadFiles/FCKeditor/20210606145542.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986084a2d0c---87558863893.pdf
    • http://diysmart.net/userfiles/file/vewigamurivi.pdf
    • http://absolutelyneon.com/userfiles/file/30218434743.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16079c8669008e---9370003037.pdf
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b6753216d60---82245386317.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607131f4035ff---38267559495.pdf
    • http://tokyoto.pl/UserFiles/file/najejozemufaxawiboze.pdf
    • http://randalljroutson.com/clients/44711/File/raxijar.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160af6a216dbcc---69568109662.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b7323799b12---65635038735.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608409924a7fd---19258307461.pdf
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/3fv2om8i0g46d9m842hji4qn62/5439908473.pdf
    • http://sweetbasketsbyjackie.com/clients/864293/File/98100444088.pdf
    • http://maychamsocda.vn/images/userfiles/file/12522061587.pdf
    • https://etonbio.com/newsLetters/images/file/togulosokanotupoj.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118d0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x118D0 16792 bytes
font_01_sfnt_off000130e2.bin
74f63c78243834ebc913174d4b5a477a26e19ef78baf29be6a6489b21b2d54ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x130E2 18356 bytes
font_02_sfnt_off00015f7f.bin
617129ae3af95bce613eac35f0b883cf31b3037f5e30857cd026cc3e33f3571b
pdf-font-stream PDF embedded font (sfnt) at offset 0x15F7F 10540 bytes