Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3aaab56a9924a0…

MALICIOUS

PDF

75.4 KB Created: 2021-06-01 22:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 28268e780b05356ababeb206898866e7 SHA-1: f4a48078239e3e41278425e00676b417ec2461ce SHA-256: ce3aaab56a9924a05ac40f238a3de5bac92931403b13882452ac421bea7ed462
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and is flagged by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily corrupted, suggests a lure related to transferring WhatsApp data, which is a common tactic for phishing or malware distribution. The presence of numerous external links, many on disposable hosting, further supports a malicious intent to redirect the user to potentially harmful content.

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://pixomot.ru/pbw?utm_term=como+transferir+whatsapp+iphone+para+iphone PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419413/normal_60034b8550dce.pdfIn PDF document text
    • https://sojujigun.weebly.com/uploads/1/3/0/9/130969910/5ceb0eeee45f98.pdfIn PDF document text
    • https://xedatuvigino.weebly.com/uploads/1/3/4/5/134580066/nasazetebipule.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489050/normal_5ff2d88ea546f.pdfIn PDF document text
    • https://tabuwesajusa.weebly.com/uploads/1/3/1/8/131856124/wezesobupam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482854/normal_5fe064b290716.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388048/normal_60095eb267bcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465151/normal_602fc22f0ff63.pdfIn PDF document text
    • https://xofudafitigo.weebly.com/uploads/1/3/5/3/135327781/f194084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402267/normal_602534879cfc5.pdfIn PDF document text
    • https://jikevumuvovidu.weebly.com/uploads/1/3/4/3/134324483/jugimoxemif.pdfIn PDF document text
    • https://dokarugosili.weebly.com/uploads/1/3/4/3/134362608/gevat_tabaxabonol_sufab_kiwikujaxe.pdfIn PDF document text
    • https://guladusive.weebly.com/uploads/1/3/0/9/130969442/3245199.pdfIn PDF document text
    • https://gikotibosad.weebly.com/uploads/1/3/4/3/134332820/5224809.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/3043129.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4445119/normal_60afea5709410.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/500aeb6d-7162-4b91-8558-2255e0f8d3fa/quanto_se_paga_de_imposto_de_renda_nos_estados_unidos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/095382d7-242e-482a-bc4f-218a65e6f2d0/80654880516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d008197-df7f-472f-8b9b-5773811b7ac2/kenmore_elite_french_door_refrigerator_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04b93562-1683-41c4-bf1b-9c754297fee1/20020910358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/139c1128-3d3b-4e43-9908-7d5a50b459a7/39165365818.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_off0000e9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FF 5104 bytes
SHA-256: 1b62fad1b79f9423761a4d2695f91bc8ab218ffefc1d9714ef7b8c20076d78a5
font_01_sfnt_off0000fb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3D 10820 bytes
SHA-256: 8b811c651112dce552a83ac8a1b5febcc95313a35bdc4d0a8a2db69ac3b446b5

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