PDF malware analysis — malicious · 9ddc4a3b920ab39c

MALICIOUS

PDF

75.3 KB Created: 2021-01-22 22:54:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11

MD5: cc8ae162219590b245db0ab6f32bf5fb SHA-1: bb45bf49f1286dc03278eddfc44636511b04859d SHA-256: 9ddc4a3b920ab39cf3d1bf5b4abc084deca3bb78faec4dfc81b833772efe3534

226 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links, identified as a link farm, likely for SEO manipulation or to host malicious content. The presence of CAPTCHA-themed lures and a ClamAV detection for 'Pdf.Phishing.Trojan' strongly suggests a phishing or malicious content distribution intent. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE

PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
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://trafficel.ru/123?utm_term=i+need+scissors+61+meaning PDF link annotation
- https://cdn.sqhk.co/jigavozef/gicEDcp/survival_island_the_forest_3d_apk.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4369328/normal_5fded0e99c46e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4465257/normal_5fd3af48ec9a3.pdfIn PDF document text
- https://cdn.sqhk.co/nujudemugipi/Iie417c/2captcha_bot_para_android.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4482023/normal_60089fb7a46fd.pdfIn PDF document text
- https://cdn.sqhk.co/zanotunuzi/idTigGw/kasef.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4380209/normal_5fe55035162ea.pdfIn PDF document text
- https://sasasukaga.weebly.com/uploads/1/3/4/6/134624721/dadezuxiji.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4422368/normal_5fd7cdfc5cd98.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4481400/normal_5ffd1a8a2e619.pdfIn PDF document text
- http://baxemoge.iblogger.org/49677837019.pdfIn PDF document text
- https://menedufigejit.weebly.com/uploads/1/3/1/4/131482930/b7e48450f7d31d.pdfIn PDF document text
- https://cdn.sqhk.co/jezuleku/hPhiqgi/ltc_terminal_cloud_miner.pdfIn PDF document text
- https://cdn.sqhk.co/jepivitixiwo/bennhiZ/megesasalotu.pdfIn PDF document text
- https://cdn.sqhk.co/zetanitanedo/hfijsO9/ruduko.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4446512/normal_5ff079f257744.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://wipapirub.epizy.com/deberopepobepazose.pdfIn PDF document text
- http://towupew.epizy.com/91054910856.pdfIn PDF document text
- http://gevuwomomot.epizy.com/gasum.pdfIn PDF document text
- 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dd7e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD7E	5080 bytes
SHA-256: `1176133ef807894db0f499cdf7213d76a022e8b3c624d3e3315e3a88aaf2b9fa`
`font_01_sfnt_off0000ee98.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE98	10208 bytes
SHA-256: `afc694673af9f3613ba86de9218e8ad51ad7b055674d47b2cee86d256304650f`
`font_02_sfnt_off0001117c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1117C	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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