PDF malware analysis — malicious · 749a18e9fd09d765

MALICIOUS

PDF

75.5 KB Created: 2021-01-28 09:39:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: d99b07115e7515df1d691bbff6166bc6 SHA-1: 5350366c5ba652557fc4ec4cf3dae45c92ec57e4 SHA-256: 749a18e9fd09d7656b1adf97d077aa988eda99dbf067cbb730996a431ac79a93

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was identified as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains or potentially malicious content, suggesting a link farm or phishing operation. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it may leverage embedded JavaScript for malicious redirection or content delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/123?utm_term=inner+fender+liner+jeep+jk PDF link annotation
- http://ribupisid.22web.org/alcatel_flash_plus_2_stock_rom.pdfIn PDF document text
- https://cdn.sqhk.co/gudijupimeb/dgihDjd/scoreboard_basketball_online.pdfIn PDF document text
- http://mofawab.66ghz.com/server_rack_layout_template_excel.pdfIn PDF document text
- https://cdn.sqhk.co/nakunadubux/zLhccjc/crazy_ball_3d_online_game.pdfIn PDF document text
- https://fobaripiso.weebly.com/uploads/1/3/4/4/134443650/dilarafevetopok.pdfIn PDF document text
- https://cdn.sqhk.co/pabelewexo/xcgiljb/2129711229.pdfIn PDF document text
- https://resagivet.weebly.com/uploads/1/3/1/3/131383325/vozugogim_menenarakoj_lulisoluwetor_notusumozitof.pdfIn PDF document text
- https://venozosuvizulul.weebly.com/uploads/1/3/0/8/130814909/b1908b1e08bb.pdfIn PDF document text
- https://cdn.sqhk.co/jogekiluse/fthjHhd/bellevue_baptist_singing_christmas_tree_2020.pdfIn PDF document text
- https://wojadamizaxit.weebly.com/uploads/1/3/2/6/132681796/genixawutulasuv.pdfIn PDF document text
- https://ralixuviromod.weebly.com/uploads/1/3/5/3/135345966/dusanaw.pdfIn PDF document text
- https://cdn.sqhk.co/zupodejadofe/gjpB3xd/fozofuzadubugogovesimulur.pdfIn PDF document text
- https://nezubarenegutel.weebly.com/uploads/1/3/0/7/130776328/kuwizip.pdfIn PDF document text
- https://pusifife.weebly.com/uploads/1/3/1/4/131407530/d54ebcf0a2.pdfIn PDF document text
- https://xisubuto.weebly.com/uploads/1/3/1/3/131380177/b17030d7cfa9d.pdfIn PDF document text
- http://sq11mini.com/429655295960wt5w.pdfIn PDF document text
- http://datingdate.site/42918582267mu0ga.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/mizeteb/xebosakeputeminas.pdfIn PDF document text
- https://s3.amazonaws.com/jumedemimo/20905062611.pdfIn PDF document text
- http://kusotuwomaru.epizy.com/vuwikezipixemozo.pdfIn PDF document text
- https://s3.amazonaws.com/tabobujimo/furagovejazutoti.pdfIn PDF document text
- https://s3.amazonaws.com/xakusineba/grade_9_science_worksheets_ontario.pdfIn PDF document text
- http://jowelipap.epizy.com/budowaxonutuluz.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ea3c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA3C	4724 bytes
SHA-256: `2668fff1217c32268f57c3ab5b071e3cca2bd65e3259587b8a93b0b206a67a4e`
`font_01_sfnt_off0000fa66.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA66	11388 bytes
SHA-256: `1db1ace0ca9bcfb65baf29063a319ba60c6b9a9f776b9a63dc8d35fbbda41071`

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