PDF malware analysis — malicious · a12686faac86851a

MALICIOUS

PDF

83.9 KB Created: 2021-09-11 02:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 62cca7f1e7a6b487fc7d5f728474ff60 SHA-1: 922a7e30df6f7e472f5cd63985c684f1436e819e SHA-256: a12686faac86851a4a4609a07d0675cee3781b2fc862ab400e3d65fa91ddd3c2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress sites. The presence of numerous links and the use of 'utm_term' parameters suggest an attempt to lure users through search engine optimization tactics, potentially for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.7498

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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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://irlanc.ru/uplcv?utm_term=best+drum+app+for+android+2020 PDF link annotation
- http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134378fea00d---wokun.pdfIn PDF document text
- http://alkathirilaw.com/userfiles/files/74623899297.pdfIn PDF document text
- http://togul.org/sites/default/files/file/pelomeru.pdfIn PDF document text
- http://xn--9w3b11kh5l.com/ckupload/files/20521971927.pdfIn PDF document text
- http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wikemosatesogokoxiriko.pdfIn PDF document text
- http://servicedental.it/userfiles/files/88135085897.pdfIn PDF document text
- http://kozhencherrymtc.org/userfiles/file/narivanabibix.pdfIn PDF document text
- https://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/ranagobol.pdfIn PDF document text
- http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd17d7ac49---fekasolexegedonij.pdfIn PDF document text
- http://alpinedelhi.com/userfiles/files/wijetufixugakakutomixoje.pdfIn PDF document text
- http://managhantasala.net/mailuserfiles/file/82622329360.pdfIn PDF document text
- http://pngroup.pl/ckfinder/userfiles/files/26695172534.pdfIn PDF document text
- https://curtain.jinware.com/upload/files/23788244707.pdfIn PDF document text
- https://tecnicadovolante.com/images/file/fifuteb.pdfIn PDF document text
- http://df-2.de/images/daten/file/xuwon.pdfIn PDF document text
- http://nhasachnguyenvancu.com/Images_upload/files/36007156967.pdfIn PDF document text
- http://hotelclinton.it/userfiles/files/sekuwag.pdfIn PDF document text
- http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16134e869c7eb6---30189396258.pdfIn PDF document text
- https://minipowerpack.net/upload/files/47337437416.pdfIn PDF document text
- https://yellowstonewildlife.com/32923115691.pdfIn PDF document text
- http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/34218716147.pdfIn PDF document text
- http://madmojo.com/fckupload/file/vegevidaledifi.pdfIn PDF document text
- http://innotack.com/userfiles/file/kigekejoli.pdfIn PDF document text
- https://vetregistr.com/ckfinder/userfiles/files/55445491513.pdfIn PDF document text
- https://csp-pub.com/stockages/files/sifemaxopisa.pdfIn 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_off0000eb2d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB2D	18204 bytes
SHA-256: `91e433eccab01fc5d12a7e2ba36cf03f271d901dfeb16662dae623045661ef9a`
`font_01_sfnt_off00011a5b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A5B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013272.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13272	11008 bytes
SHA-256: `d19e80ee32fe6575a8350074b57321dac804e6c49192c751db197fbe8a10280f`

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