Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb14b605c28af5b…

MALICIOUS

PDF

72.3 KB Created: 2021-03-10 23:16:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 559042b24f02270c495feda904bf8e3c SHA-1: bdf369aa7cc5f676b1e61db53ec38e5a27f418c9 SHA-256: 9bb14b605c28af5ba230d5a9bdeb552443e23a6807bbf2a7d2366a7c24848ffe
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting a phishing or malware distribution scheme. The presence of external URIs and the ML classification strongly suggest this PDF is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=all+about+me+student+worksheet PDF link annotation
    • https://fegajasun.weebly.com/uploads/1/3/4/5/134502742/kebunuwimogapalo.pdfIn PDF document text
    • http://fullstacket.online/62948345707pwwag.pdfIn PDF document text
    • http://interbankdigital.com/vugomaropozorer1q.pdfIn PDF document text
    • http://fly-drive.online/460453544126y465.pdfIn PDF document text
    • http://gatorama.fun/ditevizunujomubagilulimpon4i.pdfIn PDF document text
    • https://nabinavupofi.weebly.com/uploads/1/3/5/3/135350319/jagetafaxoxitavitu.pdfIn PDF document text
    • http://lofoporubatul.mygamesonline.org/6378002545.pdfIn PDF document text
    • http://pazifelurup.medianewsonline.com/do_hansel_and_gretel_die_in_the_original_story.pdfIn PDF document text
    • http://babitilakibo.mywebcommunity.org/roman_mythology_stories.pdfIn PDF document text
    • https://tedotedonux.weebly.com/uploads/1/3/0/7/130775879/5084519.pdfIn PDF document text
    • https://pidilamobojuri.weebly.com/uploads/1/3/5/3/135310388/zulobodizukipejer.pdfIn PDF document text
    • https://bovojopo.weebly.com/uploads/1/3/2/3/132302970/masukilasi.pdfIn PDF document text
    • http://slmit.fun/goxirekekakinuwokx4k3o.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/weniwirosites.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/wesezuzuvalirik/mr_dieingly_sad_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/wosig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b94a876b-1534-41d7-b582-fae5df271cbf/53640708200.pdfIn PDF document text
    • http://bixozebaxikapos.atwebpages.com/homemade_wood_lathe_stand_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b61bb1e-1673-4046-b4cb-03f24350315b/93003705486.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d294e92b-1b4d-4ff9-adba-635d22e2609d/17117812665.pdfIn PDF document text
    • http://pikaderobiw.atwebpages.com/brucellosis_in_humans_and_animals.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_off0000dec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC5 5352 bytes
SHA-256: ab02c93b9c234098d17a5bd92b8627a60d68ab2c974944f9eb41c5d3298eae9e
font_01_sfnt_off0000f0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D6 10276 bytes
SHA-256: 12d5bd1dd5f01a99c25c3f2bafb240d3a2a60e2eb780c36284dae7c6681f9f57

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