Malicious PDF — malware analysis report

Static analysis result for SHA-256 3621c87fd9ddb2f0…

MALICIOUS

PDF

75.9 KB Created: 2021-05-02 11:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 501a43e8d66f11ce71fc6cbda748a8f7 SHA-1: 706abaa9a2d4233c0720555d77287134f0653ff8 SHA-256: 3621c87fd9ddb2f03b53bb6230bf4733d3d04bb026393dbf19dd1d9481aa73b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier returned a high probability of maliciousness. It contains a large number of external links, many of which point to unknown or potentially malicious domains, suggesting a link farm or SEO abuse tactic. One of the extracted URLs, 'https://resalured.ru/strik?utm_term=is+me+before+you+on+netflix+2020', is directly associated with the PDF's content and is likely a primary distribution point for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=is+me+before+you+on+netflix+2020
    • https://cdn-cms.f-static.net/uploads/4443588/normal_602c9d284b358.pdf
    • https://cdn-cms.f-static.net/uploads/4459337/normal_60411d1d4d7d5.pdf
    • http://detonic-de.website/lagimamejirizusubitoxuz5jxhy.pdf
    • https://cdn-cms.f-static.net/uploads/4407733/normal_603e401d8fa76.pdf
    • http://1xbets-reg.site/kannada_ambari_movie_background_music44cbv.pdf
    • https://cdn-cms.f-static.net/uploads/4383930/normal_606ba35f75353.pdf
    • http://5coupons.info/budujoluwazy9ku8.pdf
    • http://zatoboyvibor.fun/93187071794lugwg.pdf
    • http://edaruzal.xyz/tewunadixexabokekodpqv7.pdf
    • http://dopezonuj.iblogger.org/94237981060.pdf
    • https://cdn-cms.f-static.net/uploads/4489404/normal_6011192736fbc.pdf
    • https://cdn-cms.f-static.net/uploads/4462976/normal_5fd13d2a3626b.pdf
    • https://cdn-cms.f-static.net/uploads/4371248/normal_6053438079f11.pdf
    • https://cdn-cms.f-static.net/uploads/4491671/normal_60355d3e3a0a5.pdf
    • https://static.s123-cdn-static.com/uploads/4450244/normal_60044af1a4e27.pdf
    • https://cdn-cms.f-static.net/uploads/4389352/normal_60612458c666c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zarusegibitumet/what_is_enlightenment_kant_explained.pdf
    • https://s3.amazonaws.com/zesixefe/maplestory_power_leveling_guide_2019.pdf
    • https://s3.amazonaws.com/wuvepilamamuse/brother_ls_1520_sewing_machine_price.pdf
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_6b47122f6d354053a09be9aa982d44d8.pdf?index=true
    • http://pujivij.epizy.com/64081149710.pdf
    • https://3c2b787d-8465-4662-bdcc-bf736d584291.filesusr.com/ugd/8760e7_de057c635ee5475a9ec161d5ea0021e6.pdf?index=true
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddf0.bin
f05b11ae489c836b0c1de07628fc8de6c9375c8e7352cd5bbde9bb6109d40b31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF0 5104 bytes
font_01_sfnt_off0000ef3d.bin
0100f3a62c312b832da3ed34af4367209386de7832b57a0ce8cd4c8fc203e9f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3D 10864 bytes
font_02_sfnt_off0001142d.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1142D 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.