PDF malware analysis — malicious · f7b1ca8b99496d7a

MALICIOUS

PDF

90.8 KB Created: 2021-08-01 22:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18

MD5: f4003f7ff9821b644c023b9838752c0d SHA-1: 7da0c95a500ec7d3e53206dd809c6809c0e179fe SHA-256: f7b1ca8b99496d7a678a5c515d18b911d26dc601821f278debb666302da3a16a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous URLs, many pointing to compromised or disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish for information. No scripts were extracted, but the structure and URL analysis strongly suggest a malicious document.

Machine Learning

Nyx PDF Classifier malicious score 0.9985

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://barrospizzadb.com/uploads/files/70592739261.pdf In PDF document text
- https://zionapostolicministries.org/uploads/file/49631219551.pdfIn PDF document text
- http://xn--szabowski-tub.pl/userfiles/file/wemas.pdfIn PDF document text
- http://kojeneckezbozi.eu/userfiles/file/sipopatunivomunidukakinog.pdfIn PDF document text
- https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16075d4cb26567---83654800136.pdfIn PDF document text
- http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c9abd17fcaf---wewelewigewadugeka.pdfIn PDF document text
- http://cesishotel.com/res/wysiwyg/file/35734123886.pdfIn PDF document text
- http://5percent-design-action.com/upload/users/files/87482146663.pdfIn PDF document text
- https://feng-shuiworld.com/userfiles/file/56972047648.pdfIn PDF document text
- http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16079622d251bd---99474910359.pdfIn PDF document text
- http://jkbprivateiti.com/userfiles/file/rezib.pdfIn PDF document text
- https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/84kbdskstmbif1klqiqkk2gec9/10587635515.pdfIn PDF document text
- https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/o2ru3ipeq48lv2g99m3imve7n0/73104887233.pdfIn PDF document text
- http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a71c12a443---30662613015.pdfIn PDF document text
- https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/ba6267955e82fdc11a8638d4ff65a56e/waramilokomafakesajuw.pdfIn PDF document text
- http://scamps.biz/userfiles/file/vonelikikimotunijug.pdfIn PDF document text
- https://naoshima-habitant.com/17205610004.pdfIn PDF document text
- https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/4a45f01182b2bda18cebb28e5de2c6dd/losinuv.pdfIn PDF document text
- https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/207eb1b7f741c7faede703b0b41de0e1/vinudipafemi.pdfIn PDF document text
- https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160d7a8b56a134---34953270658.pdfIn PDF document text
- https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa1fb7be0e---27425117448.pdfIn PDF document text
- https://vidaleve.net/ckfinder/userfiles/files/32019976103.pdfIn PDF document text
- https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/320cfe970d84a11a128bce8e42eeea7b/95522837902.pdfIn PDF document text
- https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/56b54cd743cbf3ff1d0d673505e4c176/bawivujukiromeragugugogun.pdfIn PDF document text
- http://watthaistuttgart.de/userfiles/file/disilakos.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=making+stuff+cleaner+electric+cars+worksheet+answersPDF 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_off0000fca4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCA4	10884 bytes
SHA-256: `83e120a6f80e0c38a25910524343b5891d87aca7340425b9dcd9bd8e1cb203dd`
`font_01_sfnt_off000115e1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x115E1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012df3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12DF3	17756 bytes
SHA-256: `4eea3f6bac6f6df20e76c9c913b911ff39f21dbd6f24c9b53ef644e1391d6433`

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