PDF malware analysis — malicious · 26bcd7a9f9d336e1

MALICIOUS

PDF

81.8 KB Created: 2021-04-25 12:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10

MD5: ea5b62822034ef5a68d6b9d5e6af0a77 SHA-1: 04d9c76f3b4fef5e209fb5565de583ca4f7f1923 SHA-256: 26bcd7a9f9d336e1aa656b2f88adc091f69a3a5ed6a1c31bec55276a489119af

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is 'https://nipisod.ru/strik?utm_term=3+characters+long+example', which is likely used to redirect users to malicious content or phishing pages. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', further supporting a phishing or malicious intent.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://nipisod.ru/strik?utm_term=3+characters+long+example PDF link annotation
- https://cdn-cms.f-static.net/uploads/4413573/normal_601ff7509a01e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4387046/normal_5ff2f0c7f0d97.pdfIn PDF document text
- http://xizugef.medianewsonline.com/safety_reliability_and_risk_analysis_theory_methods_and_applications.pdfIn PDF document text
- http://xuxijosut.sportsontheweb.net/55624322599.pdfIn PDF document text
- https://cdn.sqhk.co/jobolekul/CgjP1oI/54352747357.pdfIn PDF document text
- http://waparudadip.mywebcommunity.org/wamudubakejaxi.pdfIn PDF document text
- http://gisoboxizaza.mygamesonline.org/al_bayan_download.pdfIn PDF document text
- https://cdn.sqhk.co/tudobele/ggC8gde/sositivubaxoxosuxutevigov.pdfIn PDF document text
- https://cdn.sqhk.co/kifateten/hahiHie/pocket_rally_full_apk_1._4_0.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4446915/normal_6007c43494d18.pdfIn PDF document text
- https://cdn.sqhk.co/noxomosanena/gfzgdib/ufc_fight_island_live_results.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
- https://s3.amazonaws.com/vetamedisoz/android_17_vs_piccolo_tfs.pdfIn PDF document text
- https://s3.amazonaws.com/pululusodogi/new_bollywood_movies_2012.pdfIn PDF document text
- https://s3.amazonaws.com/bokelur/lirekuneruxafesoxu.pdfIn PDF document text
- https://s3.amazonaws.com/loranoduzuja/12160396394.pdfIn PDF document text
- https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_9d3d90426bf24bda86ecde0b1f3e6a6b.pdf?index=trueIn PDF document text
- https://486bfeb6-87d8-40a3-812f-3449909c9139.filesusr.com/ugd/81b904_b9d722f4f0d6440c94a24ff72a876dc6.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/jivagajamav/toyota_corolla_2008_manual.pdfIn PDF document text
- https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_b087096c906a42c9af981f083598672c.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/woxorojero/nuworilafixajafupomifeka.pdfIn PDF document text
- https://s3.amazonaws.com/getizar/what_are_the_general_questions_for_an_interview.pdfIn PDF document text
- https://3a988cde-8684-4da7-9cc5-a1c078ef4475.filesusr.com/ugd/1f7474_194b85501ac24852960a93d8ed463326.pdf?index=trueIn PDF document text
- https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_6e940483a6f0489d8aee908efd58f722.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/fowikorejodi/how_to_open_midea_washing_machine.pdfIn PDF document text
- https://s3.amazonaws.com/mijumomub/36171149582.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_off0000f186.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF186	5224 bytes
SHA-256: `5127ca5f40a0ec9dc87439ba923819a098e39d33c4a7b5efe01e7aae870014ae`
`font_01_sfnt_off00010316.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10316	12356 bytes
SHA-256: `62f18be6bb8e39606b5adfc16d427ac107e997bf6c4d7c5069981e73562cce87`
`font_02_sfnt_off00012bb8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12BB8	4324 bytes
SHA-256: `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`

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