PDF malware analysis — malicious · 1d48dd737bc21902

MALICIOUS

PDF

75.7 KB Created: 2021-02-25 06:01:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22

MD5: 08a4bb484c51eeb38978409f05f4de0d SHA-1: 0193baece3e5c8152ebc89873d680e5fe39b7d94 SHA-256: 1d48dd737bc21902594bba566eab96838a53df51e8b0dd4c5922cb791e2699a4

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which are part of a link farm on disposable hosting, suggesting a phishing or SEO poisoning campaign. The document body, though malformed, contains a URL that mimics a search query, further supporting the lure-based attack pattern. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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
Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH

A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
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://jottigo.ru/123?utm_term=who+are+the+sumerians+in+the+bible PDF link annotation
- https://runufegoxow.weebly.com/uploads/1/3/5/3/135347372/109d3ced19.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388040/normal_600aaee97f01b.pdfIn PDF document text
- http://lnstagramverifiedbadgeservice.com/65423795213bc39b.pdfIn PDF document text
- https://godivibodo.weebly.com/uploads/1/3/4/0/134040440/93da142c75b3b56.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4471273/normal_5ff3f9bd75c7f.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4415291/normal_5ffb6f48197b5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393356/normal_5fd1186383f25.pdfIn PDF document text
- http://4bochki.ru/richmond_water_heater_error_code_11ijl5o.pdfIn PDF document text
- https://damobupakul.weebly.com/uploads/1/3/1/4/131453350/86f7faacb356e.pdfIn PDF document text
- https://timijajuvage.weebly.com/uploads/1/3/2/6/132683040/6228322.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4454694/normal_5feedbd390da2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4500200/normal_5fd63852431b0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4417824/normal_6036d2ceb3750.pdfIn PDF document text
- http://shoppermarket.online/178365912850ario.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387702/normal_6025b6e809bea.pdfIn PDF document text
- http://jerijoba.iblogger.org/mips_reference_sheet.pdfIn PDF document text
- https://xufanipup.weebly.com/uploads/1/3/1/8/131856619/113896dc748687.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4411681/normal_5fd9d07177f61.pdfIn PDF document text
- https://neriborotarisim.weebly.com/uploads/1/3/4/3/134345051/midefizam-zomejidibifa-pipanimevo.pdfIn PDF document text
- https://kususeni.weebly.com/uploads/1/3/2/7/132740764/votosigiz.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://miloxagiwe.epizy.com/avenza_maps_para_android.pdfIn PDF document text
- http://fanofajuduma.rf.gd/number_line_subtraction_worksheets_kindergarten.pdfIn PDF document text
- http://luzeparuzibez.rf.gd/12541291219.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_off0000eb0a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB0A	5076 bytes
SHA-256: `7e89978bffc5fb73c93d799a606c75b426e3f4424012e5e69ec61ddf30f5e10e`
`font_01_sfnt_off0000fc2f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC2F	10848 bytes
SHA-256: `57a49c04c4a4303441b1b48a2f886046d13a5cc0d6a7902a9b371901573fbb5c`

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