PDF malware analysis — malicious · 842f08c7b9f619a7

MALICIOUS

PDF

85.2 KB Created: 2021-09-01 13:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: ede03654159af94bb3c4075e56e75cfb SHA-1: 6f753f6cfe7af9a9d9b5b4289aee6c768fc898f6 SHA-256: 842f08c7b9f619a720f8b4982a8029075286a5429403cd8b94875c5755ff5368

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The embedded URLs, such as http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d5fc77121---tosepironidodubovup.pdf, are likely intended to deliver further malicious content or facilitate phishing attempts.

Machine Learning

Nyx PDF Classifier malicious score 0.9919

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://ankurgroups.com/userfiles/file/69108955825.pdf In PDF document text
- http://instant-image.net/UserFiles/Site/File/nimenoserobejibipero.pdfIn PDF document text
- http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d5fc77121---tosepironidodubovup.pdfIn PDF document text
- https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/5b597149e59a1254d2e5094e84e97b8a/98418578778.pdfIn PDF document text
- http://gancza.pl/userfiles/file/kujitotoginefakevipolov.pdfIn PDF document text
- http://kiajihlava.cz/UserFiles/File/69857641135.pdfIn PDF document text
- http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160fdfad567b8a---rojuxaw.pdfIn PDF document text
- https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/262e41066c428b8b40b3e812443e49ed/zajidelomogamokag.pdfIn PDF document text
- https://salvamontbihor.ro/app/webroot/files/userfiles/files/72890811939.pdfIn PDF document text
- http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a0194dc5b52---18030327403.pdfIn PDF document text
- https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/0d79c7f5b67f6eb3f0f5236928da8b59/jekubalerevibebuliwoku.pdfIn PDF document text
- https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/7b9ab643d029abe7eb439435f566baa1/gatofeworugepifu.pdfIn PDF document text
- https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848be5d769c---12318833821.pdfIn PDF document text
- https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4bf85ddaee---rateruno.pdfIn PDF document text
- https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/etjko9lus23lj9v0rjtocdrdis/53397386498.pdfIn PDF document text
- https://aprilboya.com/userfiles/file/fomafozivegezepu.pdfIn PDF document text
- https://jjcfurnituremaker.com/userfiles/files/riwidizaparafesixodipukut.pdfIn PDF document text
- http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e54a117ea0---28735465498.pdfIn PDF document text
- http://ptairsupply.com/userfiles/file/fijovugurenefiwudu.pdfIn PDF document text
- http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b52f005b0cc---85352093964.pdfIn PDF document text
- https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/3c69549a47d2f7b59ed004d7c047b261/76657741329.pdfIn PDF document text
- https://vettercycles.ch/userfiles/files/98113759450.pdfIn PDF document text
- http://hgbs.de/userfiles/file/wuvinimosinesuli.pdfIn PDF document text
- http://tao-ssct.org/data/upload/file/20262337161.pdfIn PDF document text
- http://pushgroup.lv/userfiles/files/buviwofesetuf.pdfIn PDF document text
- http://residencecarlofelice.com/userfiles/files/81942491771.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=i+am+having+difficulty+swallowingPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e6d7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6D7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000feee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEEE	11008 bytes
SHA-256: `16255b1afa6abcbc01489cbcbd9bd0b8bcc985b739dd4f3a19ae9aa80ec3f8d4`
`font_02_sfnt_off0001182b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1182B	17328 bytes
SHA-256: `66c86d873ea04df56a397c453cba27fb1330163013911be630f6fd627cf8dd6b`

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