PDF malware analysis — malicious · d1b3d107996647f5

MALICIOUS

PDF

78.5 KB Created: 2021-03-15 16:38:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10

MD5: 367ebf534acbdbb2532b2bac61fc666c SHA-1: f2116f78bdae7bb150ab94b0aee47fe9e80c72d2 SHA-256: d1b3d107996647f56424a2b15d2f864f97e0c7db7680daeac26a9f6a15c4da02

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to suspicious domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm for SEO manipulation or to host malicious content. The presence of external URIs and the overall structure suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9961

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://pelibifir.ru/aws?utm_term=how+to+fix+my+lg+refrigerator+water+dispenser PDF link annotation
- http://boost-store.net/joycon_droid_pc_download8kwed.pdfIn PDF document text
- http://yandex-delivery.cc/gakujazivimeofpe.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376125/normal_602c4bafc7348.pdfIn PDF document text
- http://smartline58.ru/tanagilatebixadbzlx.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4459794/normal_603c7c3303247.pdfIn PDF document text
- http://help-bluebadgecenter.com/873329609935dzu5.pdfIn PDF document text
- http://minedabepafosu.iblogger.org/56606440171.pdfIn PDF document text
- http://itravelgr.com/lg_front_load_washing_machine_cleaning_tips6w0d2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4414166/normal_604b3f3ee97b1.pdfIn PDF document text
- http://mscredit.info/lamb_the_gospel_according_to_biffb5ybg.pdfIn PDF document text
- http://oneitstore.info/5725503005091q19.pdfIn PDF document text
- http://firstsecu-paypal.com/innovate_uk_funding_guideslm54.pdfIn PDF document text
- http://verification-help.business/rulefewogifavaa3nno.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4462056/normal_6044d83da8462.pdfIn PDF document text
- http://sofejisogon.22web.org/45963137155.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/mavixu/chamak_kannada_full_movie_online.pdfIn PDF document text
- https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_969699be17e548009ccbaeabc74dbfc1.pdf?index=trueIn PDF document text
- https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_91ded31c043f4f729bc3be2f00605886.pdf?index=trueIn PDF document text
- https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_153af009f32b41c89085deaf28f43316.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/fosalizuzu/37833691197.pdfIn PDF document text
- http://vurujixeja.rf.gd/how_old_is_the_dell_optiplex_3010.pdfIn PDF document text
- https://be934b08-0dcc-4e2e-8de1-c3c1c32dbfab.filesusr.com/ugd/d5415a_ae97dd53a4fe4dc6936794f810d4c055.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/jevopemosod/74784659312.pdfIn PDF document text
- https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_88735175fb0f4fe196d2ae4b74018909.pdf?index=trueIn PDF document text
- http://sezajebufixi.epizy.com/sufapogabexujir.pdfIn PDF document text
- http://xekalorebopir.rf.gd/68580021983.pdfIn PDF document text
- https://s3.amazonaws.com/sorogamat/musculoskeletal_system_quiz_with_answers.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_off0000f41a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF41A	5584 bytes
SHA-256: `65689fae45fd6e46d40c82b5f950bee339928cc9d1d9a4f7197c9f245391d9c3`
`font_01_sfnt_off00010724.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10724	10816 bytes
SHA-256: `f12f15653df4fdc35bb7fc9840f569545324268cc6d4c86468fe187416ce00ce`

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