PDF malware analysis — malicious · f2c582094e93e65b

MALICIOUS

PDF

77.8 KB Created: 2021-04-04 22:09:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13

MD5: 5fa3019ffa4074795d478968003fb0fe SHA-1: d12d1c94407feff4407ef616bee42c5ae86dca7f SHA-256: f2c582094e93e65b8cd2e37c4589c4785b93f89c6d7d90084590c2b5370e6644

186 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, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to reference 'Taco bell burrito supreme nutrition data' and 'wkhtmltopdf', likely as a lure to disguise the malicious nature of the embedded links.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

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.
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://ponafet.ru/strik?utm_term=taco+bell+burrito+supreme+nutrition+data PDF link annotation
- http://sanasesuj.iblogger.org/23250672555.pdfIn PDF document text
- https://cdn.sqhk.co/tuxonewebuke/ThgjfNJ/winner_soccer_evolution_mod_2020.pdfIn PDF document text
- https://cdn.sqhk.co/nozujeraguje/chb3gc8/27411852070.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368218/normal_5fd9039dabb7f.pdfIn PDF document text
- https://cdn.sqhk.co/wuvupalib/4ODDhhX/50607734604.pdfIn PDF document text
- http://belkwigs.com/gems_of_war_soul_farming_guideqecis.pdfIn PDF document text
- http://mixed-rootwork.com/on_becoming_an_alchemist55sm7.pdfIn PDF document text
- https://cdn.sqhk.co/mamidusidozu/iENjeUF/nafukuwavuzi.pdfIn PDF document text
- https://cdn.sqhk.co/mirusopujame/gmhjgiC/tv_serial_photos_download.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4451225/normal_6046334e0771a.pdfIn PDF document text
- http://grandov.pro/subopozazumesiridoruiddh5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382639/normal_60221322877e2.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
- https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_b86c3eeff38545d989350ecf429c80f3.pdf?index=trueIn PDF document text
- https://1423d76f-a56f-4481-bf87-726e17039346.filesusr.com/ugd/14aee2_79c031b8b1d84012b12fd4dd8b65b470.pdf?index=trueIn PDF document text
- https://def26600-86c9-4442-a738-094ddf2992d1.filesusr.com/ugd/eb5a6a_95d886735e4f4b8ca910a7ddc9250243.pdf?index=trueIn PDF document text
- http://disefubukub.rf.gd/fopimogomunaxajizow.pdfIn PDF document text
- https://6d0c6d30-55b9-4b7f-8145-34d11b484ddf.filesusr.com/ugd/8db56d_d502257f7ac641fb862e920fb8316aa4.pdf?index=trueIn PDF document text
- https://c4e42e93-254c-4ba8-b495-737f84002742.filesusr.com/ugd/ddb60a_752d435b43124de982e1eb4afa6136c6.pdf?index=trueIn PDF document text
- https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_2d40474b780a44e2a800ee5465bcf5eb.pdf?index=trueIn 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_off0000e56c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE56C	5192 bytes
SHA-256: `cb1afb0c993d7c5de396186cf14e9aaad54885efe168eade866ae2f9f83d00c9`
`font_01_sfnt_off0000f6e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6E7	10888 bytes
SHA-256: `eade733cd2dfeac2153af2aa13de7ea7a7fd67a743411af83483b187bef874e0`
`font_02_sfnt_off00011c1a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C1A	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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