PDF malware analysis — malicious · 04494d001e7c9f08

MALICIOUS

PDF

80.2 KB Created: 2021-03-23 15:29:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13

MD5: 1107e6327f0e9d8338144bd8bf74ed7d SHA-1: 0404566c96f5671d041d0f31d48509ab84afe6d4 SHA-256: 04494d001e7c9f085dcb13a980711169111cc8e3482effe0ef8a0f663dfe3ac1

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The embedded URLs and the PDF structure suggest a link farm designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, contains text related to search queries, reinforcing the lure aspect.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

Heuristics 5

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.
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://bologen.ru/wix?keyword=realidades+2+capitulo+2b+prueba+2b-3+answers PDF link annotation
- http://kapovulup.mywebcommunity.org/biopsychosocial_model_addiction.pdfIn PDF document text
- https://mefufexuwi.weebly.com/uploads/1/3/4/0/134019004/cfb10656dab.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4502178/normal_5fca0c7cae137.pdfIn PDF document text
- https://zomurudol.weebly.com/uploads/1/3/4/4/134492975/1a5648c8ab.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4447640/normal_5fefe6cd331f3.pdfIn PDF document text
- https://nubiduxabegi.weebly.com/uploads/1/3/1/8/131871606/vimiruzu_teluzinifil_mixafilot_pufivefazon.pdfIn PDF document text
- https://lasapiboxemifol.weebly.com/uploads/1/3/4/8/134865682/xelirevakavin.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4478414/normal_6051f099d27da.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4447097/normal_6040432d30759.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453344/normal_6048eba002e35.pdfIn PDF document text
- http://simagasavopajet.iblogger.org/cbse_chemistry_syllabus_for_class_12.pdfIn PDF document text
- https://meligobuv.weebly.com/uploads/1/3/1/0/131070858/9383998.pdfIn PDF document text
- http://riniwovefaraw.22web.org/letter_format_for_granting_permission.pdfIn PDF document text
- http://wozupabalaviv.medianewsonline.com/91699271443.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://fedorahosted.org/lohitIn PDF document text
- http://lazuletezofik.onlinewebshop.net/reticulitermes_lucifugus.pdfIn PDF document text
- http://boripodadup.epizy.com/whats_the_difference_between_a_remington_700_adl_and_bdl.pdfIn PDF document text
- http://vudutetadi.epizy.com/11329109091.pdfIn PDF document text
- https://s3.amazonaws.com/bezutu/kesipepi.pdfIn PDF document text
- http://sitafefisoju.atwebpages.com/how_cognitive_behavioural_therapy_works.pdfIn PDF document text
- https://s3.amazonaws.com/woneketelak/79077651320.pdfIn PDF document text
- http://wesofidufu.rf.gd/nofigavugozezamom.pdfIn PDF document text
- https://s3.amazonaws.com/fomudebipefasu/80191872976.pdfIn PDF document text
- http://sewujajapivix.onlinewebshop.net/calligraphy_books.pdfIn PDF document text
- https://s3.amazonaws.com/rebesudanolo/watixodamoloxonog.pdfIn PDF document text
- https://s3.amazonaws.com/lijopavexanuse/aviator_movie_english_subtitles.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_off0000e618.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE618	5636 bytes
SHA-256: `b8f8b4d1d9f9ea1b6f1c1fd9b03f00e8e1d99944bffd2ea51714ae5a26afdb6d`
`font_01_sfnt_off0000f965.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF965	11544 bytes
SHA-256: `ed687feae33ff0e0a88c7fa6a9533773cc727d9b2de228e7927d23bd8869d18a`
`font_02_sfnt_off00012048.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12048	4896 bytes
SHA-256: `4de24da767e68c6d6c7cbbe9e26cdbd6217a4708adccee13793ed007f8286493`

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