Malicious PDF — malware analysis report

Static analysis result for SHA-256 870b04cf7dab77ed…

MALICIOUS

PDF

95.6 KB Created: 2021-06-27 01:17:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e2ebbadd0b22a7d9a9975aea24dc9fe6 SHA-1: b6df22ac8e85a6ed324443d4c5a1305619096e64 SHA-256: 870b04cf7dab77ed898c78ad28209bbb3e16340b47fbdac57e948190e6079dae
196 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it is an advance-fee scam lure. The document contains numerous links to compromised CMS upload directories and disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/c13811191f901f296982ab3472948f80/jinataredozal.pdf
    • http://firmykominkowe.pl/Obrazki/edytor/file/xubetipak.pdf
    • http://ackerviewguesthouse.com/userfiles/file/40711071965.pdf
    • http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/nazobijeripenemofomi.pdf
    • https://hoakhanh.vn/uploads/image/files/39140973803.pdf
    • http://airconbank.com/upload/fckeditor/file/zepuwibekidurisopuke.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/b237b1cca5c3deed7ec20f7b2db84b4b/61501083656.pdf
    • http://rhodeislandalpha.com/clients/56223/File/kuloneparisiten.pdf
    • http://finproekt-msk.ru/userfiles/file/85322974202.pdf
    • http://bitite.lv/media/txt/122/file/kagixitu.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a1bd4c34d1a---43041328208.pdf
    • https://karapinarinsaat.net/userfiles/upload/file/fobanivipuvitidososivoma.pdf
    • http://zjxfjc.com/uploadfiles/files/81228457877.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/3aa9hn4noje3nj13q6o2dt2clu/36901821180.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4496616c8---16237297857.pdf
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/bktpp2s8n7df9pmj775u521pe9/famimumimamuzebotuserekit.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/tmjn9plg6no2j5de4p8lqb77mm/tapinukugotipupulamewesog.pdf
    • http://xn--e42bt3l.net/upfile/files/75264686391.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607462c556c5f---84753042614.pdf
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210518090148.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/b7655333aae92397392a2cb19a9f0ffb/93728075689.pdf
    • http://ozdesignhouse.com/app/webroot/uploads/files/suxepudonuwuruwuris.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160acfa1b31a09---bepatuwibidoxolasewobozo.pdf
    • https://burstallconrad.com/editor_files/file/71898035684.pdf
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/b5004b7cb83215be394d17dd52645a6f/dixoduniwe.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/mant96gjkqfuf90jljf0qbosn6/kuzezunagoboke.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=10+gm+silver+price
    • 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_off00011238.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11238 16792 bytes
font_01_sfnt_off00012a4a.bin
48f5cb15eb7314e62fa9a852bd5016fa0a326db0a0b42d5a4fd114073e71ec71
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A4A 17848 bytes
font_02_sfnt_off000159a3.bin
305081ec85373de71894bbab0065e2c8bf67db55bce8977223209d2fe4e85976
pdf-font-stream PDF embedded font (sfnt) at offset 0x159A3 10376 bytes