Malicious PDF — malware analysis report

Static analysis result for SHA-256 d90fa8a745b02ea6…

MALICIOUS

PDF

132.6 KB Created: 2021-07-18 00:29:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 736a10cda86764b2f5f8f81d522df0f1 SHA-1: 73e925e8c62bf296e03d1ff0eb5ae154cfad9bc0 SHA-256: d90fa8a745b02ea6fe76287486cec86a64f425a8a2966014f24f3874b716457e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malicious content distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9654

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://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/f526e4d02a664745e7ffcc8283eaf1ce/paneza.pdf
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/b633143fe65a80d4ad35df94f1bbf498/3441866243.pdf
    • https://radmangroup-ye.com/rgfiles/file/mumaperaxumoxapo.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/40845d11e6c16b016979a1cc2091c047/76642533442.pdf
    • https://wotfiles.com/ckfinder/userfiles/files/jadijazut.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/kipkcbb2m3u35rip44tlkgp4qg/29221416715.pdf
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/3699599223.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078089884d82---fijobusojize.pdf
    • http://sehs67.com/clients/e/e0/e078d4d0076166a7bb489ca3b3a583ab/File/50997406271.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609366413c9da---15526604812.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa679e563a---rorofilovejerisobelu.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/524ddc6c1e3f458ca37e99d2019410ba/tevubelezaxuto.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/9l1n3kodpld1ns5fs6h33j3744/61448229772.pdf
    • http://blbr365.com/userfiles/file/1624136931.pdf
    • https://detectiveoffice.net/userfiles/file/rusutafazezexedoditenud.pdf
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea3e3b9c69---kabojajijupovomakuzimit.pdf
    • https://betentour.com/sites/default/files/file/jedejexotet.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817d96add45---tuzajuvoxozojamobu.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/b580de7dcbf061e7f340263523313779/kubekaz.pdf
    • http://barcelonasixtytwo.com/userfiles/file/39535741933.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9693b0a6b4---295253210.pdf
    • https://doganagolosa.it/file/rebiposoxunufovelazamogug.pdf
    • http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/26849251040.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=courageous+in+tagalog
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017274.bin
4a175874b597b35d079891f62768f93672ba80c8d7a6da2e3f390e809ae78f56
pdf-font-stream PDF embedded font (sfnt) at offset 0x17274 10416 bytes
font_01_sfnt_off00018a33.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18A33 16792 bytes
font_02_sfnt_off0001a245.bin
7c6cd2ab0d4c8173c66da11264179a1a4f3b2ef0537fc275de905d1c83569eff
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A245 26200 bytes
font_03_sfnt_off0001dfb0.bin
ed4c9efc938096ab66e3f6e925c4b80ed54ec49d8cd5546ed47f8a37494a5626
pdf-font-stream PDF embedded font (sfnt) at offset 0x1DFB0 16784 bytes
font_04_sfnt_off0001f7c6.bin
dfd485248fb07a2c24075648fbf8e6f769e9a9ff3eb99e0e8d4d24270bdb92b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F7C6 2700 bytes