PDF malware analysis — malicious · 067f8b46b6fd06a8

MALICIOUS

PDF

88.9 KB Created: 2021-08-25 16:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 3ea17a592478b3b2298e7bdf23c69978 SHA-1: 5c0b821714897251148a6ff5df3fe1ff641ec3fc SHA-256: 067f8b46b6fd06a8c7470df3b0f570579d3d302da89b65fd1858fe89cfb2435d

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites, suggesting it is used as a lure to redirect users to potentially harmful content. The presence of a link farm on disposable hosting further supports its role in a malicious campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9954

Heuristics 7

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609084b3ea215---74928349990.pdf In PDF document text
- https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16120d3a9c0fa0---12081603847.pdfIn PDF document text
- http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/o3t2nntinht46h4irdrl56dss3/povetoxopabixapu.pdfIn PDF document text
- https://receptabc.hu/images_banner/files/fugafizekosuzubabit.pdfIn PDF document text
- https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/1e764200c881945ab7e063d2af1b5291/31453958832.pdfIn PDF document text
- https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/35e9da47e90ac0a6502efd4212351026/bekiwoxudopaxomazin.pdfIn PDF document text
- https://arch.ua/ckfinder/userfiles/files/sogagadax.pdfIn PDF document text
- http://okzawidow.pl/img/upload/files/keduvapukuwugekavofenut.pdfIn PDF document text
- http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35631c7e90---ranudijapaluwedarututak.pdfIn PDF document text
- http://www.asslar.de/downloads/zenuboburijilix.pdfIn PDF document text
- https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/2ik33t3gnpmghe6fg1jlkp04jj/jedagoladibiko.pdfIn PDF document text
- https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/37d68ea98a17b7d06d4f3b48c738594a/36979237932.pdfIn PDF document text
- https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985d3fbe506---96889287632.pdfIn PDF document text
- http://secureyun.cn/uploadfile/file///2021082504371262.pdfIn PDF document text
- http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612027c029551---35706580570.pdfIn PDF document text
- https://topclassgreenery.nl/images/file/6698955110.pdfIn PDF document text
- https://kildevangen.dk/files/37741753269.pdfIn PDF document text
- http://zaun-produzent.de/userfiles/file/84632373089.pdfIn PDF document text
- http://logtech.cz/foto/Image/file/44984231060.pdfIn PDF document text
- https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160910ede3c627---1191996305.pdfIn PDF document text
- http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078927fa776e---maxuma.pdfIn PDF document text
- https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f0d74907a4---55234962061.pdfIn PDF document text
- https://anjingliar.com/contents//files/84311575026.pdfIn PDF document text
- http://fipjp.com/userfiles/file/detofesafewakifiwifoja.pdfIn PDF document text
- http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b91c37beb7---zavomatapokevasoxogu.pdfIn PDF document text
- http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160869d6c21693---96005043728.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=feeling+faint+day+after+tooth+extractionPDF 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_off0000f376.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF376	10780 bytes
SHA-256: `dba286d67e8cd7edbd2f4eef66ffdb1eb49896596e038087ea8a628f736dcc67`
`font_01_sfnt_off00010bfd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BFD	18760 bytes
SHA-256: `6f2d81c118cc0c0ea3876e7735d780d6117af76243e9433ea875f71de3fd38ea`
`font_02_sfnt_off00013b90.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13B90	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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