PDF malware analysis — malicious · a2e57c88a8d19ab1

MALICIOUS

PDF

85.4 KB Created: 2021-03-29 07:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 647c10b685fe1af619be3398331cfa84 SHA-1: e658c855fe36cfba407b1a2658535148b4c4f68c SHA-256: a2e57c88a8d19ab1f0df55dad923dc7127dd0e609e9883daf462fa5785ac216b

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with one prominent URL pointing to 'bologen.ru', identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself facilitates redirection to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9950

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://bologen.ru/aws?utm_term=percy+jackson+and+the+olympians+books+ranked
- http://mekujoviwe.mypressonline.com/how_to_add_cards_to_cards_against_humanity.pdf
- https://cdn.sqhk.co/batumozi/dxeheia/butajixad.pdf
- http://zusiwibewire.mypressonline.com/gegave.pdf
- http://lulilafemavivog.mygamesonline.org/jk_bank_syllabus_2020_download.pdf
- https://cdn.sqhk.co/rogekanus/hghIheq/fubujesegutunelekofujav.pdf
- https://cdn.sqhk.co/goropakuvoge/iiibrjb/rixuvedikinotijuwidako.pdf
- https://cdn.sqhk.co/zuzipogowita/jgdYC6U/gesofirudosubafu.pdf
- https://cdn.sqhk.co/foxidagon/hNggkic/idle_penguin_game.pdf
- http://kexolifowuj.medianewsonline.com/the_crown_season_3_episode_3_imdb.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/lakujusitejojet/retasagutosa.pdf
- https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_931fd545f8e146cc84ab67c7e91d5468.pdf?index=true
- https://uploads.strikinglycdn.com/files/fa6101c4-6563-482d-a367-6725f83d82a6/18682126343.pdf
- https://ff8eac81-0dee-4da4-b7c1-1dee070544a7.filesusr.com/ugd/2637cf_b35dbf71430b46d4885adc95c6fe5929.pdf?index=true
- https://s3.amazonaws.com/tobito/nugujopizap.pdf
- https://uploads.strikinglycdn.com/files/012988a7-1df5-40cf-a99c-edff6ffd21ba/43756657825.pdf
- https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_71054a0fb11a45fcbe57525d7bd2ffe5.pdf?index=true
- https://s3.amazonaws.com/woxewiwupir/bikilokovubatox.pdf
- https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_6b04a74cf5904badab608d9a001cd2bb.pdf?index=true
- https://315736c7-1030-4200-8d24-05c9f4951019.filesusr.com/ugd/d19ca0_99fecb7b3d514d8492ac7bc4171b37ab.pdf?index=true
- https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_b117a42f8df84bd6b85170dc08d5b70f.pdf?index=true
- https://uploads.strikinglycdn.com/files/39f01028-cfb1-44d2-ab69-de5c696b718e/how_do_you_start_a_masterbuilt_electric_smoker.pdf
- https://s3.amazonaws.com/xijuxosisomuna/35853543287.pdf
- https://8a5a474a-a671-4857-921d-d1df0ee72544.filesusr.com/ugd/523716_0478652d5cc846f196ffe07397b7078e.pdf?index=true
- https://s3.amazonaws.com/tasufagijaremo/sad_violin_music_meme_sheet_music.pdf
- https://uploads.strikinglycdn.com/files/d020a8db-377a-40d8-926e-73d059216229/big_green_egg_charcoal_for_sale_near_me.pdf
- https://f33d1b56-f518-462b-b61f-c1b5c1ba661c.filesusr.com/ugd/1c44ce_976c166dce4c4e669ae27c3d8c03f814.pdf?index=true
- https://uploads.strikinglycdn.com/files/eda5c1f1-afa9-407b-bfec-a036f2f46c35/2010_camaro_ss_rs_headlight_bulb.pdf
- http://magegefopo.atwebpages.com/wokafolupajokezumivosavox.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f89e.bin` `31afd7bb65835a8036814c830eee84e302f8d7f500d10ac259f0b564a1cf27bc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF89E	5696 bytes
`font_01_sfnt_off00010bda.bin` `fbeee6084883c0fb4eb1a97e8fad769ae68ada1712038cb1a812454a7e4862f0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BDA	10604 bytes
`font_02_sfnt_off0001305f.bin` `d781c508aaf473e50263a6aabc3f4161b7fa10724c54bb8d35addee38a7f1c44`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1305F	16164 bytes

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