Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69ae713057c75f6…

MALICIOUS

PDF

87.8 KB Created: 2021-06-26 02:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 310cc649966cde31d5ec2613eb2685ea SHA-1: eeb66ec890fc6460a84cd527c6befc0d5809ade3 SHA-256: c69ae713057c75f659b308ca9d1b5716b28b9c5b2581af2662be9f34789ffc96
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to compromised CMS upload directories, suggesting an attempt to lure users to malicious content or downloads. The presence of multiple distinct hosts and the use of UTM parameters indicate a coordinated effort for SEO poisoning or phishing.

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 https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/8f2a265557f47ca6abc549e64c057c01/rafijatakapozowetomeraze.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16086fe6bb723c---15357305217.pdf
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/gemorisazatozim.pdf
    • http://progfin.pl/userfiles/file/86111938577.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/f6595526ec1ae86d80f73f91982a0b9c/92402499250.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098784854217---fixaxekanesiv.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/e386030c9d52f83c8c6796ff41a980d7/bozodaxiguwepagazan.pdf
    • http://texmet.pl/userimages/file/75734876148.pdf
    • https://avigailpekelman.com/sites/default/files/file/bodaporalinujer.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/kdrrljpc33caic8oq3g61b1ai4/duseditaxeb.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/nk34noral2eiep342861spvpk8/77055127785.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/32520a6ff372ccee00ea3545d8416523/siwemerovamuseg.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/0c2eeb91fee501109611c80adf36b96e/nubupupefuriz.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c36c6d0cbbc---96794388317.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/b85819cea45b8a1a60148fd1ba18087c/76747154463.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/d31fdf6ca15352ec815c9f868e120e96/dejabiviwon.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160ae531276220---zuvupezafonekebide.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b19f2941db---rituraf.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607084c241b50---turelunubunuvasobela.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/bh888r6h6apjjfltmumsji8bg2/zipigi.pdf
    • http://ahcxdq.com/uploads/file/160006172473.pdf
    • https://invest.pl/userfiles/file/jopekedomigugamikojodu.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/da28c95bde2876eb4ff1e87a9be13d99/bizitujezuvudi.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd4919c514---javadamaxepaxebuvi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=heart+and+soul+chords
    • 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_off0000f440.bin
ab8c1a8be39cd646ddf51f4962f759a66d580a19c15b375b70a6489dfd7f7244
pdf-font-stream PDF embedded font (sfnt) at offset 0xF440 10464 bytes
font_01_sfnt_off00010bed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BED 16792 bytes
font_02_sfnt_off000123ff.bin
74fa7526ff397ae342cd8195cff366786ade3870e5da1dd0779d7729afc42749
pdf-font-stream PDF embedded font (sfnt) at offset 0x123FF 17172 bytes