PDF malware analysis — malicious · 2dc6bfc5592ee500

MALICIOUS

PDF

77.7 KB Created: 2021-04-01 17:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: c42c262e9dffa2caa0b1c8abfd9cc9e9 SHA-1: d3aa42125cf48573c1ed1ea21e7bb5bcdf693efc SHA-256: 2dc6bfc5592ee5001c918f7ea3c46ade0866eb3a260f8f737523ddb87c7d700a

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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
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.
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://druttle.ru/award?keyword=selenium+webdriver+java+tutorial+for+beginners+pdf PDF link annotation
- https://nixogizuriv.weebly.com/uploads/1/3/0/7/130740196/dikunuteji.pdfIn PDF document text
- https://xutonipojoneri.weebly.com/uploads/1/3/4/6/134667901/4534002.pdfIn PDF document text
- http://wabexikorininaz.22web.org/xepadev.pdfIn PDF document text
- http://kitazixozakabu.sportsontheweb.net/vigegupewofi.pdfIn PDF document text
- https://madafodem.weebly.com/uploads/1/3/5/3/135397102/dcca6.pdfIn PDF document text
- https://jumomemokipus.weebly.com/uploads/1/3/0/8/130874307/9c904943e06410.pdfIn PDF document text
- https://juwaxevepatasi.weebly.com/uploads/1/3/0/8/130874094/tuleli_wutegipawas_tesuw.pdfIn PDF document text
- https://safopuxe.weebly.com/uploads/1/3/4/8/134893808/lusenexava_vafanerofupive.pdfIn PDF document text
- http://siwupojotuj.getenjoyment.net/ceratite_pigmentar_em_ces.pdfIn PDF document text
- https://bilunoxenaxu.weebly.com/uploads/1/3/4/4/134474733/nurulixejevud.pdfIn PDF document text
- http://xatarekinusafo.iblogger.org/webaxujinoxamizubeniga.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://litorow.myartsonline.com/razor_e200s_scooter.pdfIn PDF document text
- http://zepibugab.rf.gd/69572343695.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cce1bd0d-79ff-45c1-b937-e1fcabc2bd43/diwiwizanomokorofenutovum.pdfIn PDF document text
- http://sosasofojatage.epizy.com/zuzafot.pdfIn PDF document text
- http://novosumagib.epizy.com/interior_design_portfolio_layout_templates.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/83a61e98-af3b-465f-8494-e3024e633e0c/chevy_traverse_window_wont_go_up.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ad01af5c-2c69-42f0-be18-fda5f4852314/how_to_park_downhill_manual.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_off0000e54c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE54C	5832 bytes
SHA-256: `1c0ecd94dd89233d89cb831fa350c65d9b3c13ee57b88cb61d746839ed276972`
`font_01_sfnt_off0000f91e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF91E	2140 bytes
SHA-256: `3eadf3ff1ae85f7a2dd8be852d633ca148c1d24200a16cbd4325889adc5789c4`
`font_02_sfnt_off000102f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x102F8	10588 bytes
SHA-256: `afe940e681f546b9bd45d03c081c3640c91563dd4f81c258d1acfea8d1f3cb99`

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