Malicious PDF — malware analysis report

Static analysis result for SHA-256 5822047b54c91919…

MALICIOUS

PDF

84.0 KB Created: 2021-04-08 05:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 752868e09be0546e69ecb0ca34e47a8d SHA-1: 59df8999220fa21fa3e019af914567cb41221c13 SHA-256: 5822047b54c919193b55b9db544f3452d5206937c7e14ad6d1e59619e0fc16ae
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are generated for SEO purposes, indicating a link farm strategy. The primary URL, 'https://lozipotod.ru/wix?keyword=can+i+change+invoice+number+in+quickbooks+online', suggests a lure related to financial software. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/wix?keyword=can+i+change+invoice+number+in+quickbooks+online
    • http://dosaxixapaxa.medianewsonline.com/liletitofigokexi.pdf
    • https://rimofunoduw.weebly.com/uploads/1/3/4/5/134525219/nexezijinot-motesigipaxum-tedurekugep-kifukom.pdf
    • http://lighterusb24.site/95376707038ctguf.pdf
    • http://kafalukuwemi.mygamesonline.org/multilingualism_theories.pdf
    • http://zibikudupe.mywebcommunity.org/onde_baixar_livros_gratis.pdf
    • http://bagerisevi.scienceontheweb.net/63455531937.pdf
    • http://dumigegin.medianewsonline.com/causes_of_cardiac_arrhythmia.pdf
    • https://zosotise.weebly.com/uploads/1/3/5/3/135393527/bupova.pdf
    • http://lenudes.com/dodalibikofezodiduv33ncr.pdf
    • http://ladirojenovezoj.mygamesonline.org/ford_e350_cargo_van_for_sale.pdf
    • https://woxazalaxit.weebly.com/uploads/1/3/4/2/134235403/tadun_vamesemidobo.pdf
    • http://nigemutekilum.mypressonline.com/cuanto_gana_un_diamante_en_amway_2019.pdf
    • http://xutusurekawidi.medianewsonline.com/21903961620.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://desejole.myartsonline.com/adversus_jovinianum.pdf
    • https://0621cc9e-6449-4e8a-a8bd-baee9ad62a2c.filesusr.com/ugd/affb4a_95f07f1cc31f4eeeaec499e6ff6daeff.pdf?index=true
    • https://0bdb67af-4c57-4a6e-9706-714cc80719f5.filesusr.com/ugd/fc840b_825721a2ab1a4da0b98b8047dfca72d3.pdf?index=true
    • http://suzifoki.myartsonline.com/marketing_digital_que_se_estudia.pdf
    • https://edcb5511-827b-40b0-97c1-3499c313f96b.filesusr.com/ugd/0779a3_84e931cdf7f54d9fa1258e3d13f0c820.pdf?index=true
    • https://006b50d4-ad2a-4261-8279-34542eb0d7b0.filesusr.com/ugd/a640e9_376ed0e0dc704157a014b09ead1fe972.pdf?index=true
    • http://manuwakagekewu.onlinewebshop.net/genetics_worksheet_high_school.pdf
    • https://67536400-2f23-40e2-9d3a-36ae3f4dfb8c.filesusr.com/ugd/5312ea_03d1acb0983f43c0b3c642bc96c98d93.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f46e.bin
1ddabf66e7a2200dca89901057acafa03413c275024e664167667c152878c593
pdf-font-stream PDF embedded font (sfnt) at offset 0xF46E 5508 bytes
font_01_sfnt_off000106fe.bin
2cfb6c702dbf09507a2d486a97a98b1b5b46cc4b20130c0b48f8a8ef038095c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x106FE 11232 bytes
font_02_sfnt_off00012d91.bin
35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D91 16036 bytes