Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0668effa056141…

MALICIOUS

PDF

72.5 KB Created: 2021-02-09 04:41:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0b4396dfdfd4192fc70096e5a8d50d53 SHA-1: 784b9215881f7a1d4007d012566c10649fd415b0 SHA-256: ad0668effa056141f21759c7ff4a45009f1a991054e59bc20a004dee28631e3d
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The 'Information about indian army training' lure is likely a pretext to drive traffic to these malicious sites. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent, potentially leading to further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://maypoin.ru/aws?utm_term=information+about+indian+army+training PDF link annotation
    • https://supavutoni.weebly.com/uploads/1/3/4/7/134713891/1578320.pdfIn PDF document text
    • https://gujowidupisume.weebly.com/uploads/1/3/4/1/134131448/vezeku-palapevag-nadib-dalula.pdfIn PDF document text
    • https://masejufubalabej.weebly.com/uploads/1/3/4/3/134388341/nasonilikox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471455/normal_600af46ec9224.pdfIn PDF document text
    • https://vopoxeja.weebly.com/uploads/1/3/5/3/135346001/9747225.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451350/normal_5ff64a8790ebd.pdfIn PDF document text
    • https://sudomudes.weebly.com/uploads/1/3/0/8/130874284/zunilukukeza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455174/normal_5fd1281b4cefe.pdfIn PDF document text
    • https://lazumuron.weebly.com/uploads/1/3/4/8/134863931/togowab_purowevavazeji_vajutoboxux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392207/normal_5fccb6d80f944.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_601c8e819dcc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489734/normal_601fc7743dd5c.pdfIn PDF document text
    • https://pakotoroxup.weebly.com/uploads/1/3/0/8/130815058/furotudizozesof_memanuxiwa.pdfIn PDF document text
    • https://vufegolafo.weebly.com/uploads/1/3/0/9/130969987/putixozaxefupi.pdfIn PDF document text
    • https://zokelafeg.weebly.com/uploads/1/3/4/8/134889419/0020ddf7e0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420476/normal_5fc6d1d12160e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407303/normal_5fe81a34836a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE027 5196 bytes
SHA-256: 5cb5c010f4c236c9f1a1b16e7c8c5d3a61deb9b2f042e993cc4845ab7ec399f5
font_01_sfnt_off0000f1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C7 10292 bytes
SHA-256: 9fd2a3270ff0b40c51b8515258af1b8883221a0c5e840a61d1a3bba77332d526

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