PDF malware analysis — malicious · 83cdb7057e0432ee

MALICIOUS

PDF

94.9 KB Created: 2021-07-23 18:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: d5ed0b4cf34588442fd60f98b2e37efd SHA-1: 45e8eb4b061b0e2ef838f3148221ce94bc81c361 SHA-256: 83cdb7057e0432eebad59544ea351187e623de6aeb332342900ba3d8ce5522ba

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

Nyx PDF Classifier malicious score 0.9927

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://pasarangroup2.com/contents//files/5164014194.pdf In PDF document text
- https://condominiovillage.com/userfiles/file/68403692337.pdfIn PDF document text
- http://topup-fight.com/ckfinder/userfiles/files/64087676103.pdfIn PDF document text
- https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/b47c2a9b3016b8c9893ff3c7dc32e5ce/63722157111.pdfIn PDF document text
- http://arablift.net/userfiles/file/28776721706.pdfIn PDF document text
- https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/egm23u70oigqb5cv6qskfa1qgb/73462557710.pdfIn PDF document text
- http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/3a9085ef706ed8c2b111a6887b952ec7/dimonupamutaw.pdfIn PDF document text
- http://zartmobilia.com/userfiles/file/20210529010636.pdfIn PDF document text
- https://press-centr.com/images/file/kevow.pdfIn PDF document text
- https://peptidturkiye.com/ckfinder/userfiles/files/90413857383.pdfIn PDF document text
- https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/9ac011d61fe5aff9d4f30a4f9fc0ccca/womiragigebo.pdfIn PDF document text
- http://harryreichert.de/uploaded_pics/News/file/wusupupijomebepan.pdfIn PDF document text
- http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d29709131c---xomixemudiverironife.pdfIn PDF document text
- http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3571e61cd0---zojevela.pdfIn PDF document text
- https://addsfly.com/userfiles/file/deweb.pdfIn PDF document text
- https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/689cdf992d80eef6783c3301966f62d2/3865437282.pdfIn PDF document text
- https://kildevangen.dk/files/tabebola.pdfIn PDF document text
- https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/l3gn7bedmupmrf020ra3mmr7la/rutafi.pdfIn PDF document text
- https://diaochue.vn/userfiles/file/kobomemiwinesafoj.pdfIn PDF document text
- http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b6e0d65b1---8885601275.pdfIn PDF document text
- http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081b3cdf307d---5925742585.pdfIn PDF document text
- http://bowenworktimmins.com/clients/e/ed/ed750a77e36579213b976c45729ba45c/File/72598282164.pdfIn PDF document text
- http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kujupatenelofutumizonen.pdfIn PDF document text
- https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14e7600fec---tuviditoletejunojuxezuw.pdfIn PDF document text
- https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5ede4ac600e5f68e479089a35ab2432b/simaluterar.pdfIn PDF document text
- https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b59adb780e9---gaxodavixugufabuporerazu.pdfIn PDF document text
- https://repare-ton-smartphone.com/userfiles/file/giwixoga.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=lesson+3.2+shifts+in+demand+worksheet+answers+quizletPDF 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_off00010cf1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CF1	11420 bytes
SHA-256: `00140307e8d4e10bd5b5ce04bd4ec37ec57130b1f449edb8a46d8b24760b64be`
`font_01_sfnt_off000127a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x127A9	17304 bytes
SHA-256: `8e7f3be662e46c62883861683b4bd10c277101f3e11b58251f309656bbb9092d`
`font_02_sfnt_off00015458.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15458	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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