Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5c6af981fa68624…

MALICIOUS

PDF

87.1 KB Created: 2021-06-28 06:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: acccd8dcb6492a6d70b0918a9d67ab6c SHA-1: 4066062e75c0d6c27f1b2c316596e2d8e97416f1 SHA-256: f5c6af981fa686244b5ff9f400bd5327e166f81735fb751c0f5d9819bdaa21c6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious and exhibits characteristics of an advance-fee scam, likely intended to trick users into paying fees for a non-existent prize or parcel. The document contains numerous external links, many hosted on compromised WordPress sites or disposable domains, suggesting a phishing or redirection campaign. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics strongly indicate a malicious intent to lead users to fraudulent websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://drafthe.ru/uplcv?utm_term=dns+domain+name+system
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/96717144055.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16080d0b444285---28054915574.pdf
    • http://ipceurope.com/assets/file/86863498028.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d42ac2bd94---75702015841.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3c712d9d3---loxupuroxaninutigudika.pdf
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160902c37d9488---rufililoxe.pdf
    • https://migger.dk/userimages/file/67290906873.pdf
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/fowur.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa81fc371aa---7948351467.pdf
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/279fr5eu9f6189tcn64f1lmlar/27610620594.pdf
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ketolofamamuvo.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c36ffc89147---34496084452.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/14304604357f128e9e944fd7b2c1068f/34395397343.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5984a68f9---84337568262.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c05d6eb993a---xevexajipupagameloloboxor.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/dq4nmrn6pp23779kepvl7436u4/minovosu.pdf
    • http://apcmagon.com/userfiles/redovowaxufodonezinazose.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790c7447519---pevutikuvorenakijabofi.pdf
    • http://accessoriesunlimitedinc.net/catalog/file/28506522943.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/d57a9715ef3ffdc6de2cc1a152dc1704/fogikubevetabegewibogu.pdf
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/00bcrh9lq8imdu9kn5h51fsp95/zujudasasezaluwojuvi.pdf
    • http://webursitet.org/Files/file/77589016892.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_off0000f456.bin
279eff3334d40ae8f0e4026750db76ef1db22b4abf31c94ae130cfba505075f1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF456 10376 bytes
font_01_sfnt_off00010bcf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCF 16792 bytes
font_02_sfnt_off000123e1.bin
b6c4ffcb0240b379311d23682f2c3e750160db7aefb57e277e738b6023fc92fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x123E1 16676 bytes