PDF malware analysis — malicious · 8e4afb768e3b65ee

MALICIOUS

PDF

90.3 KB Created: 2021-07-30 03:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 7a0852c0b780899ab87446443762a7f3 SHA-1: 0c09ec9591dbb81da391833bc8cd3f66c430f975 SHA-256: 8e4afb768e3b65ee95518e2341d22db962c12030e9733f2f030e139a7a1608cb

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to numerous compromised WordPress sites and disposable hosting domains, likely for phishing or malware distribution. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs users to open a password-protected archive, a common tactic to evade initial security scans.

Machine Learning

Nyx PDF Classifier malicious score 0.9982

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://cructi.ru/uplcv?utm_term=dead+silence+full+movie+download+in+dual+audio PDF link annotation
- https://questyme.ca/userfiles/file/zijejovupunefutunejanope.pdfIn PDF document text
- http://nprofit.hk/userfiles/xerazevolufagujotezikudo.pdfIn PDF document text
- https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/a4e441eaa3f61c9a57b4fbe13d414052/nafapagiwevalivevimuze.pdfIn PDF document text
- https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b90724591b---lexuwibamevokabibusade.pdfIn PDF document text
- http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9d4941dfb---kadoxurupaso.pdfIn PDF document text
- https://clearpatth.com/userfiles/file/zivilajopigut.pdfIn PDF document text
- https://biogenetixpharma.com/ci/userfiles/files/6954746631.pdfIn PDF document text
- http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607175ba884ef---3396534712.pdfIn PDF document text
- http://jinohair.com/upload/files/53544003329.pdfIn PDF document text
- https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dead09dcd2---gedoruzi.pdfIn PDF document text
- https://thic.net/plugin/ce1/ckfinder/userfiles/files/fujekosadebujakimov.pdfIn PDF document text
- http://absolutelyneon.com/userfiles/file/95002891342.pdfIn PDF document text
- http://uhli-janmaria.cz/userfiles/file/wiwagatajalopabavivip.pdfIn PDF document text
- http://ctkupavna.ru/upload/file/20306857995.pdfIn PDF document text
- http://eakqshop.com/ckfinder/images_store/files/37208993771.pdfIn PDF document text
- http://dangkykinhdoanhkiengiang.com/upload/ck/files/faxufolenosij.pdfIn PDF document text
- https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/4324e5f758fe4ea994f57c335b34b095/75976042994.pdfIn PDF document text
- https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/627526a3f37fc655d8007c19c5acd80b/4362750202.pdfIn PDF document text
- http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071b26702013---23164285111.pdfIn PDF document text
- http://divodizain.ru/ckfinder/userfiles/files/18467606892.pdfIn PDF document text
- http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791e164fb9d---11792953734.pdfIn PDF document text
- http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/77929951638.pdfIn PDF document text
- http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d3789a7beb8---ravosedexukejud.pdfIn PDF document text
- 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e3c2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3C2	16164 bytes
SHA-256: `fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467`
`font_01_sfnt_off0000f938.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF938	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001114a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1114A	18136 bytes
SHA-256: `82a04496fd6d37ce80d5817b6fdf3afc5f3866436f63f185609da5143422572a`
`font_03_sfnt_off00014158.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14158	10692 bytes
SHA-256: `1192f635481268aa865e2e92dc96ebfc91bb90289a83a14f1f84f68f5d9df557`

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