Malicious PDF — malware analysis report

Static analysis result for SHA-256 57caca013d0630fd…

MALICIOUS

PDF

73.7 KB Created: 2021-05-30 18:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3167d0d76c2da5ba5f5bc5715b7991e4 SHA-1: 0b75da56955648c3527fa7d399e57fe605fdbbe8 SHA-256: 57caca013d0630fd10b41efc8c82b935281dd07bde0936d1565794f7ceff019e
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly suggest an attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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
  • 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://gimoguvi.ru/123?utm_term=medical+medium+celery+juice+book+pdf
    • https://cdn-cms.f-static.net/uploads/4393631/normal_606c69d5e0ae1.pdf
    • https://bajupeboxima.weebly.com/uploads/1/3/5/3/135327322/nexepo.pdf
    • https://faneboluti.weebly.com/uploads/1/3/4/4/134464249/e30e63f47d.pdf
    • https://wawizaliw.weebly.com/uploads/1/3/3/9/133986908/3ea07860e5.pdf
    • https://mepuralomelefaz.weebly.com/uploads/1/3/4/4/134494325/6f8997fb04b9468.pdf
    • https://tipovasikuvo.weebly.com/uploads/1/3/4/0/134041160/perotumidorotobiwog.pdf
    • https://cdn-cms.f-static.net/uploads/4412896/normal_604da5854d13f.pdf
    • https://lonutuwuw.weebly.com/uploads/1/3/7/5/137511676/9223083.pdf
    • https://vogitoroxubas.weebly.com/uploads/1/3/0/7/130739894/vikosojexol_tusojazek.pdf
    • https://cdn-cms.f-static.net/uploads/4421937/normal_602445ed7af3b.pdf
    • https://fewabobur.weebly.com/uploads/1/3/4/7/134713859/ba9957dc98a.pdf
    • https://palalolak.weebly.com/uploads/1/3/4/4/134443088/656a343280f139.pdf
    • https://wafewukim.weebly.com/uploads/1/3/5/3/135399971/muliraw_gazexuj_xunowomaz_nawirupitofuras.pdf
    • https://bijariruxo.weebly.com/uploads/1/3/1/3/131382387/pelukupozidinewu.pdf
    • https://vabuxijipureg.weebly.com/uploads/1/3/4/4/134476882/xojebajeze.pdf
    • https://pudabesipewoz.weebly.com/uploads/1/3/0/9/130969441/kugedewelezodune.pdf
    • https://fanapakukole.weebly.com/uploads/1/3/4/7/134756501/mekegotujozapu.pdf
    • https://cdn-cms.f-static.net/uploads/4368735/normal_601f6704d97ce.pdf
    • https://lififamofupuge.weebly.com/uploads/1/3/4/3/134317858/23b60f9b5ede03.pdf
    • https://wovusowi.weebly.com/uploads/1/3/4/8/134886666/nuturiwovulere.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ca05f25a-8801-4b36-87a8-f0318484d6a7/98266803796.pdf
    • https://uploads.strikinglycdn.com/files/5cdc2655-2937-4896-8c60-2f2240dd80d7/how_to_find_the_n_in_compound_interest.pdf
    • https://uploads.strikinglycdn.com/files/afe4ac40-3755-4981-9789-9bf86c4f5d18/runisaxitixuge.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e289.bin
1175be7364008e69a7cb94171802f393ddf366ac04c1aa90a5bd2d892c773a97		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE289 5512 bytes
font_01_sfnt_off0000f54b.bin
7f8d66f4133738c0a4a7132e68b4226e4d52920bdf1d4fe9038206c8c7c66d10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF54B 10556 bytes

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