PDF malware analysis — malicious · 55fd485a594bbfe0

MALICIOUS

PDF

71.4 KB Created: 2021-03-28 06:36:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 7e84f9acb7bf1ebee5275997bc26a18e SHA-1: 0d09dc4d681dff8d780e5b85810d44d3d60cf56d SHA-256: 55fd485a594bbfe087a97bf06966ff5603ee9ff84e6adfacf555c3e4e5bf03ab

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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 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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://fokemale.ru/123?utm_term=aarariraro+siruthai+song++masstamilan PDF link annotation
- https://static.s123-cdn-static.com/uploads/4366399/normal_5fc796c72f0b8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4443578/normal_604e0743b29ae.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4465685/normal_60465a3486c35.pdfIn PDF document text
- http://fbcopyright-center.com/70131308837v5xgz.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4408324/normal_5fd336fe486b5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4476782/normal_602d0dd92eeb0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4474448/normal_604adc3e60e4b.pdfIn PDF document text
- http://b0xberry.online/bakotumuja2eoa.pdfIn PDF document text
- http://flathead.us/organizational_structure_chart_template_exceljvqyi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4449000/normal_60300efde10bb.pdfIn PDF document text
- http://arendaavto.taxi/dunoktt8bd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4486220/normal_60223f384d551.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4402932/normal_5ff826045662b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383138/normal_5fda67ffdb352.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365555/normal_5fd94bb1335e6.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/fosagoba/lodukaponuvumu.pdfIn PDF document text
- https://s3.amazonaws.com/jofunozuzof/chitralahari_songs_telugu_sen.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/84b9d8b2-1c14-42ac-b2fe-1a5c1580916d/nijipalob.pdfIn PDF document text
- https://s3.amazonaws.com/sepawi/kipuzosu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/750f1d7c-c8af-44b9-8dc6-98665b13331d/bupikuroragutodajibosu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/aef0a71c-8735-44f0-91dd-79647daee847/the_blue_book_for_cars.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4e1efed1-1eda-4162-93e3-90bb08421639/24318429420.pdfIn PDF document text
- https://s3.amazonaws.com/buwosevax/datigut.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2de16153-a2ac-4d2e-980e-cf44fdbd1074/how_to_use_a_little_dipper_crock_pot.pdfIn PDF document text
- https://s3.amazonaws.com/lixisariwulo/ewg_guide_to_pesticides_in_produce.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_off0000dbdf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBDF	5088 bytes
SHA-256: `406956bc0d998ba5d1507c0c82f65b7d1b4f080c9c0264281feb76e4212d3e58`
`font_01_sfnt_off0000ed05.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED05	10268 bytes
SHA-256: `5ea5da064fa1ef3e87955493866c69a946bd73a6d8d09394903ee6987bf55eb0`

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