PDF malware analysis — malicious · a642a8608ce57f4b

MALICIOUS

PDF

91.1 KB Created: 2021-07-06 02:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: 382bfc4e80afd0b8bf3af298d3ba0473 SHA-1: af9bec5e0171f427ee2d717bc229b098bec23853 SHA-256: a642a8608ce57f4bfbe8dace96648f73f38802cdee83d4c269912f9435520ccc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. The document functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites. These links likely serve as a distribution mechanism for further malicious content or phishing pages. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/tcns3dl7e4f8d9r6vf5cj0s5ij/jumivitenerowu.pdf In PDF document text
- https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/7907abb59eb477e3e145e9f78f19827f/digumuwetab.pdfIn PDF document text
- https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160dba664dbfe9---92323444704.pdfIn PDF document text
- https://pet-fashion.ro/mm/file/tepeperir.pdfIn PDF document text
- http://candientushinko.com/images/file/rejaxedejef.pdfIn PDF document text
- https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/1b00e558e13a0c87f3d629a2c461eeba/33583330920.pdfIn PDF document text
- https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808b1ec3503---fuduwixitizizegetedaxid.pdfIn PDF document text
- https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/d8ba60c8746ed70aadbe2d6f440589c3/9010008450.pdfIn PDF document text
- https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/a8d1f7f5ec7e930a59a8e70245c5affb/8629121996.pdfIn PDF document text
- https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/91q5uo3j8gso4h8eekblop5mqa/3932410865.pdfIn PDF document text
- https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/c4ff6ektcno03cvrqpgpknnkvu/pekapelirifififepimuwari.pdfIn PDF document text
- https://accesoriosalmayor.com/images/userfiles/file/2519456219.pdfIn PDF document text
- https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c85cd18a18---linijejuzesi.pdfIn PDF document text
- https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16096f3d2de435---50315919751.pdfIn PDF document text
- https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/7b949c89217a84f50ba31f4cf3060e8c/soxetirakifin.pdfIn PDF document text
- https://wsbtitan.com/images/file/61989230471.pdfIn PDF document text
- http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/2ngcvf81b3a73nvijkihqd8h45/guruwotowebewilo.pdfIn PDF document text
- https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c290b9d721c---vikatunibuwemujunukovofoj.pdfIn PDF document text
- https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de139847c8---wiximulexadefuxunixog.pdfIn PDF document text
- https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/1ev6ntuiqcv40obj9b0i1s44g2/19664115498.pdfIn PDF document text
- http://candientuvibra.com/images/file/tazotuledokodadagozikaxum.pdfIn PDF document text
- http://tunglamgarden.com/images/fck/file/39385130432.pdfIn PDF document text
- https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/aac5ed9d60e06731c0f5313ab9915f0e/71626063038.pdfIn PDF document text
- http://suachuadienlanhhoaphat.com/hinhanh_fckeditor/file/wituxeruronezopikuxatelow.pdfIn PDF document text
- https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/9a0ec332a9da868c05538bdb75df4d65/gabewej.pdfIn PDF document text
- https://olgunbey.com/upload/ckfinder/files/72657982655.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=driving+lesson+near+mePDF 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_off000100c6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100C6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000118dd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x118DD	10420 bytes
SHA-256: `1d97bcd9c44bdff140528aa3032b9b3587839e030ab56b50252160bba885bae9`
`font_02_sfnt_off0001306e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1306E	17808 bytes
SHA-256: `05157be1f2070397e8940518f111dda621ea652fae3aee4ae555cb07c5369f9a`

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