PDF malware analysis — malicious · 809ac8decf388805

MALICIOUS

PDF

80.4 KB Created: 2021-03-15 22:48:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24

MD5: e1754887bfd9d9542cfafd6f8afcc976 SHA-1: e8d35b17830afc3f4f8edff6ea8a5b4deef696d7 SHA-256: 809ac8decf388805a8edded9db51947a0e11c7c01fd284f33275d350787f0f06

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://zajinet.ru/123?utm_term=how+to+writing+template+3rd+grade PDF link annotation
- https://wugepugozufov.weebly.com/uploads/1/3/4/7/134744675/figiwizumanujud.pdfIn PDF document text
- https://xezaresirut.weebly.com/uploads/1/3/4/7/134712286/2163693.pdfIn PDF document text
- https://sanakifagijegu.weebly.com/uploads/1/3/4/4/134404207/kanebipetiruge.pdfIn PDF document text
- http://salonly.xyz/87233002675b8zld.pdfIn PDF document text
- https://sipovabamekejo.weebly.com/uploads/1/3/5/3/135391609/2d5312f91bb.pdfIn PDF document text
- http://gadetebes.sportsontheweb.net/xosifijawisekavudugare.pdfIn PDF document text
- http://com-connexion.xyz/latest_celebrity_news_in_nigeria_2018iah7y.pdfIn PDF document text
- http://pixidilivutep.medianewsonline.com/94812620767.pdfIn PDF document text
- https://cdn.sqhk.co/simikimira/hbijp9y/13265505996.pdfIn PDF document text
- http://perevozka.ru/64886753089lvqkb.pdfIn PDF document text
- http://malespw.xyz/gusisemufivemebuxuzipa6ciov.pdfIn PDF document text
- https://cdn.sqhk.co/rojawamusula/hehiJax/rawivoxetezedulumuxiximas.pdfIn PDF document text
- https://wurokilusonopos.weebly.com/uploads/1/3/5/3/135345649/begujekonu.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://uploads.strikinglycdn.com/files/9c013607-f80c-4bed-9e99-d2482c3089a1/87163564152.pdfIn PDF document text
- https://s3.amazonaws.com/pisedij/keletoka.pdfIn PDF document text
- https://s3.amazonaws.com/gupojakami/tiluvabo.pdfIn PDF document text
- http://ziwivazud.onlinewebshop.net/lofijefofife.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/930d77b2-ff3b-4512-b406-2cb7e77aa3c1/4740436866.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f7397ae6-c454-4f19-b677-1135e03795ba/herman_miller_aeron_chair_size_c_refurbished.pdfIn PDF document text
- https://s3.amazonaws.com/xilasisefi/java_tutorial_for_beginners_free.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a441815c-1e13-4d01-b17a-04405efd940b/finding_the_perimeter_worksheets_year_4.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ad750489-a900-429f-87d9-d2c465a97fc2/nupomafuriwesumikotakuf.pdfIn PDF document text
- https://s3.amazonaws.com/zesixefe/xanir.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_off0000ee7e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE7E	5104 bytes
SHA-256: `56f72e1afac5757b78f570ec1a7dc98d0a4b1c82a9b0a198995bf8c66e8d3f73`
`font_01_sfnt_off0000ffc7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFC7	11080 bytes
SHA-256: `8a3ea69753a3f2e40257444c665ccc3af6e7aae2fab983db44efbad210e17bdd`
`font_02_sfnt_off000125af.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125AF	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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