PDF malware analysis — malicious · a5c5d2acc54f89fc

MALICIOUS

PDF

106.8 KB Created: 2021-03-20 21:04:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 3a539d48b7878a213af27f37304a9826 SHA-1: 797aeb26dffcd6d51002d8a1b84c62f505469924 SHA-256: a5c5d2acc54f89fc3f02f698e9ae6fcdfbf112364a4f4799670d93ca51e9e9ca

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'advanced vba excel tutorial pdf' and 'wkhtmltopdf', indicating a lure to trick users into visiting a malicious site.

Machine Learning

Nyx PDF Classifier malicious score 0.9988

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://midufefew.ru/strik?utm_term=advanced+vba+excel+tutorial+pdf PDF link annotation
- https://static.s123-cdn-static.com/uploads/4393358/normal_5ff2f432b5795.pdfIn PDF document text
- http://begavud.iblogger.org/zezobenewexuropo.pdfIn PDF document text
- http://warajuvevuv.medianewsonline.com/80512333446.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4467287/normal_603ab0c4c0e32.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4486042/normal_6054b894f290c.pdfIn PDF document text
- http://momarivido.mypressonline.com/xajuvutufesizawexesavo.pdfIn PDF document text
- http://serikanipesemo.iblogger.org/online_bingo_game_template.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4410414/normal_603c0a055369b.pdfIn PDF document text
- http://warixedivukinat.mygamesonline.org/best_website_builder_software.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4370540/normal_6008e40fe8984.pdfIn PDF document text
- http://mowewuwopirot.iblogger.org/bojefuzaxowiranozanu.pdfIn PDF document text
- http://www.opentle.orgIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://jumepenitujox.atwebpages.com/nejofejewatuzuxojol.pdfIn PDF document text
- http://kifobidurusidi.epizy.com/vemajunexo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bc844a35-ec4e-4dda-adc2-b234250a17c5/13286014865.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8b2b2a6e-fe45-406b-bd42-818dac3bb074/75602678743.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/72f5b189-657d-4b80-b98d-621117b9ef14/vatebedakefinexuzaxevuwi.pdfIn PDF document text
- http://lefamotepukezo.epizy.com/al_quran_arabic_to_bangla_translation_free_download.pdfIn PDF document text
- http://saxizezubunana.rf.gd/chogada_tara_loveratri_audio_song.pdfIn PDF document text
- http://tosijikis.onlinewebshop.net/the_story_of_an_hour_full_text.pdfIn PDF document text
- http://govamizoxixe.epizy.com/employee_dress_down_day_ideas.pdfIn PDF document text
- http://turegipamikum.epizy.com/bcom_full_form_in_kannada.pdfIn PDF document text
- http://virunapiwo.epizy.com/razer_blackwidow_ultimate_2013_blue_switches.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f82b124d-ab1c-4022-b42a-02fb2761776d/fugifonawitibagofalefoxar.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://www.gnu.org/licenses/gpl.htmlIn 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
`stream_004_off00014990.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x14990	14364 bytes
SHA-256: `a98df4bb1cef0efe138b123d7296bb1b3a2205e7826a4f09a65940ab964f87c2`
`font_00_sfnt_off000137bf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x137BF	5228 bytes
SHA-256: `0d4747739cef827477ddf05d109c791e049e236e436ec0949a9d1c650c19180e`
`font_02_sfnt_off000171b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x171B9	12084 bytes
SHA-256: `feb4be5b0a27245451c3c9e433a683fba7b5e514fffef50165a8804ec0bb58d9`

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