PDF malware analysis — malicious · 4aefe1629c5080ab

MALICIOUS

PDF

85.7 KB Created: 2021-03-27 18:13:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: 82133fe3e7175bb6c6f183921b05a704 SHA-1: d30316fd239d504be17bb5bea47c515ff477fa30 SHA-256: 4aefe1629c5080ab6181f147594ff23c6db842fd35faebab91e9e24e112ec426

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URLs and the PDF structure suggest an attempt to redirect users to potentially malicious sites, aligning with phishing or malware distribution tactics. No scripts were extracted, but the PDF's nature strongly implies it's designed to exploit user interaction with embedded links.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

Heuristics 5

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.
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://druttle.ru/wix?keyword=the+mouse+and+the+motorcycle+summary+each+chapter PDF link annotation
- http://7lessons.fun/whirlpool_accubake_oven_owners_manual9kps7.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4370777/normal_5fdf97d5f07fd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4455405/normal_604e8e0ee965e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4456985/normal_6004e9914c518.pdfIn PDF document text
- http://mizebojusur.mypressonline.com/gunixuketonelaxasuxanobuk.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4487386/normal_603b96ed0ff83.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4471704/normal_60149e1780765.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4443598/normal_5ff85b740ff4f.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4500183/normal_5fc57003c5db3.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4413982/normal_6005feabe4b59.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4483873/normal_6037f34a32c6b.pdfIn PDF document text
- http://zomoxoxuriw.mypressonline.com/kidodes.pdfIn PDF document text
- http://jedomagisuw.getenjoyment.net/harry_potter_and_the_order_of_the_phoenix_wii_game_walkthrough.pdfIn PDF document text
- http://kupatavosapulo.22web.org/bank_exam_questions_and_answers_in_tamil.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4493209/normal_60149fdd72849.pdfIn PDF document text
- http://yellownatural.space/zufejugw19fw.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
- http://sivigowukom.epizy.com/chapter_6_the_chemistry_of_life_6.1_worksheet_answer_key.pdfIn PDF document text
- https://s3.amazonaws.com/pewebopufupe/uppercase_and_lowercase_worksheets.pdfIn PDF document text
- http://zogadawedalifap.onlinewebshop.net/3-4_angles_of_a_triangle_worksheet_answers.pdfIn PDF document text
- https://s3.amazonaws.com/kavifunaruvi/botutijovovimimanexi.pdfIn PDF document text
- https://s3.amazonaws.com/wajibile/2566505633.pdfIn PDF document text
- https://s3.amazonaws.com/wuxupewu/68969939851.pdfIn PDF document text
- http://sazasewugekupej.onlinewebshop.net/73885039664.pdfIn PDF document text
- https://s3.amazonaws.com/kimone/vuvonovalujax.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_off00010263.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10263	5200 bytes
SHA-256: `22dd00d09ebeb750b27240be814cfecb352a82524ae68917e461cbb8432921df`
`font_01_sfnt_off000113ef.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x113EF	11420 bytes
SHA-256: `553a5e8859209da229ebba6ad7dcd1afc9efb75e0ca2a42a9e8f48117d3c83fe`
`font_02_sfnt_off00013ade.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13ADE	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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