Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7181091cd93ceee…

MALICIOUS

PDF

97.0 KB Created: 2021-07-01 00:09:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 68112d224bad1153b5773f3c29d2e3d0 SHA-1: 150acc44c2e2337f63286f097ef3149e1142933d SHA-256: e7181091cd93ceeeaded4ddfa809ad53f9ab29a5d50ba9ea6dda70a6cc01be45
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS upload directories. This suggests the PDF is designed to lure users to potentially malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f75f198ba---lejojawinilemas.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/71ce5b61006c0612d24eee7dd363cd15/38379549879.pdf
    • http://iziusb.com/userfiles//file/vigunuzaxuramev.pdf
    • https://monyetmesum.com/contents//files/wiwojonukikimi.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/bb5a392f9965b18f146ad55cd1f524ef/nufogokekipitimobozemimel.pdf
    • https://landi-bg.com/images/file/42243488664.pdf
    • http://alimentosldm.com/userfiles/file/xasamejiranibavokonumevap.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/c91f9352f2258f32d853348b186496de/24621466111.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85d4434f90---zaxib.pdf
    • http://standrewsparishhighschoolclassof1964.com/clients/70428/File/debenazejixo.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa18ebc1f21---38136418864.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/66768c7f9515de787ec75b4fb97928de/duwijazerege.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/2hmdu5cpcmsev44019blrltcn3/13541868566.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/67d9cb5dc3e011988d4bc78550086c32/nikerovabakaj.pdf
    • http://2sisaccount.com/userfiles/files/11859655930.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ca8d6bcf7---vebotezonelumaf.pdf
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/dfaa398baca21e8239f92df17803b93c/78639353291.pdf
    • https://avigailpekelman.com/sites/default/files/file/melid.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/4b3f8d6f62252cbb46d0f933c880a5fb/57706355001.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7afa2158af---51719042304.pdf
    • http://hamdard.com/hamdard/app/webroot/img/ckfinder/userfiles/files/16922816551.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160824d7960529---debukunowitilel.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+put+mono+on+a+spinning+reel
    • 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_off00011a3f.bin
3484e9ac7f6affde4d8431b15c33c6f59c06dbae50f415a451bb6000e3917f97
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3F 10772 bytes
font_01_sfnt_off0001330c.bin
c906ce3b7931500224d350fd7be234dc438971afa6bdbc264c4184a95aa439b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1330C 16964 bytes
font_02_sfnt_off00015ed6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15ED6 16792 bytes