Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe0b0bd8d7a0483e…

MALICIOUS

PDF

82.0 KB Created: 2021-04-25 06:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 31ac09f31b9ab904839a803617694574 SHA-1: 94624ac938a7aa6911857aa082d2cac29c61e7a4 SHA-256: fe0b0bd8d7a0483e0a6bf43bd2ef0f746ec59232e999929f6c9997665b28ddcb
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms and phishing lures. The heuristic 'PDF_SEO_LINK_FARM' indicates a significant number of outbound links, with 'http://yandex-dostav.ru/fukewisaroramekemijezapoa0ul0.pdf' being a prominent example. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://soxebez.ru/strik?utm_term=bba+or+engineering+which+is+better+in+pakistan PDF link annotation
    • http://yandex-dostav.ru/fukewisaroramekemijezapoa0ul0.pdfIn PDF document text
    • http://denuziwu.iblogger.org/ags_pre_algebra_workbook.pdfIn PDF document text
    • http://geekcods.com/tejunuvikamuwonedigakr71.pdfIn PDF document text
    • http://todayshop.website/gawefitiguxularvsjti.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/lorerexeg/vewudozuwototabipukedewum.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/31095414406.pdfIn PDF document text
    • http://poxalurerozelak.epizy.com/jinafipixuzipebukud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a645de9-79e5-4c5f-ba05-a1707fd1b523/rurefovenozedewanajojesis.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/kajupedipadobi.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/vabodesororababefox.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/solubilit_formule_chimique.pdfIn PDF document text
    • http://dasiwof.epizy.com/votedaze.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/linnaean_classification_worksheet.pdfIn PDF document text
    • https://4ceac43d-3374-4736-8926-b47930641487.filesusr.com/ugd/3b1191_12063dd343fe4fe09cd63de1f3413eb2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc85a001-849f-4842-be03-83d9f525e6b6/wufaxirifulipiduk.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/little_red_riding_hood_story_brief_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/xisuzipigaxe.pdfIn PDF document text
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_1955e93c58fe467aaf4259a0f4fe4804.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/palevijuj/pikidakeniw.pdfIn PDF document text
    • http://mirepili.epizy.com/mehandi_circus_movie_free_in_isaimini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b27d4470-7dff-472f-ad13-a0b221b4d22e/natefotevuwobimigegezido.pdfIn PDF document text
    • https://c1908cc8-b41e-4b5b-ab1c-53d28a7f2745.filesusr.com/ugd/913720_84d202b507424c32b4479bc11a0c5443.pdf?index=trueIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_e50df0ca560c4a43a0d8ed3323c75a8e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/palevijuj/citizen_wr100_chronograph_manual.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.

FilenameKindSourceSize
font_00_sfnt_off0001024d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024D 5508 bytes
SHA-256: 3f5f873c7fd9cafb3bb70838ed40995dac6e5cc1ce6369f3ebeff034d75b860e
font_01_sfnt_off00011519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11519 10964 bytes
SHA-256: a200f5e89c3e03445ce24b5ba4b80a8fa2922ea76657a1628f49238948062ddc

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