Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe6c9ee7dc3c265…

MALICIOUS

PDF

87.7 KB Created: 2021-06-27 23:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 00e96b991e2ccfc8ab4a6dc802324ffc SHA-1: 8650082ffb1be81260333a111d854b4bf106d321 SHA-256: afe6c9ee7dc3c26570fd7915807c49cd5cd55d8858952e647239b5327be7586a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to potentially compromised WordPress sites. These links likely serve to manipulate search engine rankings or redirect users to phishing or malware distribution pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/3bf211c2644c6101757793a8d4e42924/moluzuderesenorirazudame.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb43f5373e---reredibexek.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a65bdf521fb---wetipalatavu.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b88ee82e37b---89515957353.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/dd4f0b0864c8d8fe706713cba2c7426f/56641542735.pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/a7bed1a999382c0b28941c030c17297f/15894445064.pdf
    • http://amdind.com/userfiles/file/82190632773.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098f99f2de03---rupafinep.pdf
    • http://iccarrentals.com/files/file/11095524045.pdf
    • http://baraanduliaptti.org/userfiles/file/52356154891.pdf
    • http://anjilh.com/uploadfile/file///2021042917342152.pdf
    • https://chrmglobal.com/userfiles/file/58347577256.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a182611d9---dilef.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac84ff1e31d.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/5656361eac2f76382698f637b64996b0/69862149802.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/65706920bb0b980884a8c0da79cd4d0f/45183625150.pdf
    • https://himalayanwanderer.com/himalayan/userfiles/files/82886460765.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd83016944---91015492654.pdf
    • http://coiffurenais.com/userfiles/file/karubode.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/19b833fbda9cb9c0d23025938c4045a0/rekexoxugajigar.pdf
    • http://learningkey.org/userfiles/dokozoduzilata.pdf
    • http://bollywoodsalonskokie.com/admin/images/file/30164571177.pdf
    • http://studiovalentini.eu/userfiles/files/80395862179.pdf
    • http://wo-kop.pl/userfiles/file/3220534058.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+get+rid+of+cyst+like+pimples
    • 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_off0000f0fd.bin
2062c9a07d20d40acb16d186829849873b518bd8843b96b32d386c126c9df45d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FD 10980 bytes
font_01_sfnt_off00010a52.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A52 16792 bytes
font_02_sfnt_off00012264.bin
c5a187bcf466ee85a8983c5e4bd9e1e2d212ca2fcaa3ccf628e25c6682b258e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x12264 18132 bytes