Malicious PDF — malware analysis report

Static analysis result for SHA-256 07feff2d7a91f64e…

MALICIOUS

PDF

89.4 KB Created: 2021-09-07 13:20:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e72edc080b199e3ec2468208d2e4065a SHA-1: 68a7150562e5c0a2dba0700dbf23fd0ba195de16 SHA-256: 07feff2d7a91f64e8315b9307ea19686d786e6c1e76e599308f6dd1eda7667a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to exploit users via malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://leganordavigliana.it/uploads/file/81236015826.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/b14f76d9f4f6929305d3ccefdaa23405/xowivape.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/or770c38s05oqh11ist95qopdp/pevezulawepupofiniluv.pdf
    • http://sicompk.com/survey/userfiles/files/fezirusegu.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160afd89e38ee0---93162162988.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8ffc84084---bazejifeverutedisip.pdf
    • https://robertbah.si/files/file/zexud.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a78380c140c---97145803560.pdf
    • http://stellarp.com/userfiles/files/72548326513.pdf
    • https://ferado.vn/userfiles/file/pogep.pdf
    • https://reparationmobile.net/userfiles/file/31844297611.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/6hp4nemjhlhg84qgd6cs1gkmm3/78232049417.pdf
    • http://jatechkj.pl/upload/fck/file/sixififagadeduzedizelepo.pdf
    • http://anvlaw.com/userfiles/file/wibuzojiganuguzirubub.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/96744236e825dba65ca938f33a319e65/25480496470.pdf
    • http://konferencii.org/web/uploads/assets/file/palaribidamedemivig.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4cbf65e33e---25174471715.pdf
    • https://wegofa.com/userfiles/file/kudivafigibikuwesidagitev.pdf
    • http://www.scsk12.org/policy/files/files/38673965314.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b89a4edd7e3---zozeduso.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/61bf5fb4e3a0579083c0feac6eed0114/68966626450.pdf
    • https://zzarosiscarampola.it/file/fatodok.pdf
    • https://szabobuszrendeles.hu/files/files/19579130413.pdf
    • https://aczv.fr/userfiles/file/kevitoxoninipul.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=usp+unique+selling+proposition+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_off0000f5ad.bin
4cffb14d1966cddaae15600e84700669fa8f93f6ed7f3b11d41e88d660e8fd4f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AD 18392 bytes
font_01_sfnt_off000125d3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x125D3 16792 bytes
font_02_sfnt_off00013dea.bin
6d6a2bcd56270b8704ceecdf15ec890e29d76ad2f37734075e5fe1e28e164ea7
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DEA 10764 bytes