PDF malware analysis — malicious · 22969c93cbcf196d

MALICIOUS

PDF

82.0 KB Created: 2021-09-06 02:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 13fb3780d0702e4365edc8302803b906 SHA-1: cdfba8c412c0c82e27fb9192524b1ecfd4d17725 SHA-256: 22969c93cbcf196dda957636f79f0de65b3f94e9c5e7559fe6cb1fc70d753207

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1055.012 Process Injection

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm utilizing compromised CMS uploads and disposable hosting, suggesting a phishing or redirection attempt. The embedded URLs, while some are marked benign, contribute to the overall suspicious nature of the document.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

Heuristics 6

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.
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://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/80c5d2aa745bcc1485508a75aa5e0d7f/83479134288.pdf In PDF document text
- http://dailitara.lt/bites/uploads/file/64053996342.pdfIn PDF document text
- https://gegeny.hu/uploads/file/65250759259.pdfIn PDF document text
- https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ig9ks0k8ko2b8ljp86ap03014k/77291469214.pdfIn PDF document text
- http://happyland-nsk.net/ckfinder/userfiles/files/95029603315.pdfIn PDF document text
- https://408of53crownstreet.com/assets/media/files/loraz.pdfIn PDF document text
- https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/9ojs15e83no1ecl8lplih1765h/76581974458.pdfIn PDF document text
- https://aashianarealty.com/file/gezodibanomixigakapoz.pdfIn PDF document text
- https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/7c13cd17aa701edae79cf5384431d984/86891668203.pdfIn PDF document text
- http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d047d6ae5---69274026274.pdfIn PDF document text
- https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e418d4cab1---11302731823.pdfIn PDF document text
- https://rainbowfurnitures.com/files/files/86248984576.pdfIn PDF document text
- http://novelinternationalschool.com/ckfinder/userfiles/files/bowifuzodowazuvavozona.pdfIn PDF document text
- http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d225b225af2---23722771692.pdfIn PDF document text
- https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/e4t2qqnso791j13gf61ssk827o/puritalupagik.pdfIn PDF document text
- https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/5c566e3b9d53cb407c65409d72f8b071/82456168524.pdfIn PDF document text
- https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/a4dbd2aedd8e79ec867e8ffba53be630/sofesanu.pdfIn PDF document text
- https://brtim.com/uploads/wysiwyg/files/kejuji.pdfIn PDF document text
- https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/rih38j2nhce5ouka887ujvcj89/zulizupuverudofulijib.pdfIn PDF document text
- https://xn--80aaa1arbfjoe3bzh.xn--p1ai/data/files/90788161597.pdfIn PDF document text
- http://teleserviciomalaga.com/ckfinder/userfiles/files/9712606234.pdfIn PDF document text
- http://federalwayhighschoolclassof1970.com/clients/8/8c/8ce2019516a67423f07d8eefa67dd611/File/danutezepuxusesujigovopap.pdfIn PDF document text
- https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610be0564a0b9---gejobotifenubezebarovad.pdfIn PDF document text
- http://sassyissy.com/survey/userfiles/files/30083838464.pdfIn PDF document text
- http://aci-immobilier-douai.fr/userfiles/files/lusejilarusewevojota.pdfIn PDF document text
- http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cae8fa68553---xifukakedenexekexopu.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=create+editable+pdf+adobe+acrobat+proPDF 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_off0000dd67.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD67	17372 bytes
SHA-256: `bb94e6d07f283c6066867aadd1b7fb2e1e882a65655f40e7c8980e164eed01bf`
`font_01_sfnt_off000109e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x109E4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000121fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x121FB	10512 bytes
SHA-256: `1385665c875e0230bcdd23cce4dd580dd17d6e8a90ce2b63f3bf6eef9806eba5`

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