Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f086f2db3e13350…

MALICIOUS

PDF

76.5 KB Created: 2021-03-31 06:35:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 88dd91a9823cf5ebc4d78e4584f989ed SHA-1: 3f45f4de4929fa58b6720ed6d584c082f0b3879c SHA-256: 9f086f2db3e13350e1126b7ad2b3511a4660663c56f10c1c81e6bfe7c063094d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to link farms, indicating a phishing or SEO spam campaign. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs, particularly the one to `lozipotod.ru`, are likely used to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/award?keyword=ventouse+delivery+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481403/normal_5fcb290bad5b1.pdfIn PDF document text
    • https://mosuvixixe.weebly.com/uploads/1/3/0/9/130969854/wuwotajerusomona.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455657/normal_5fde4a9739eae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447888/normal_602d7dbd1565c.pdfIn PDF document text
    • https://mogidudurunupiz.weebly.com/uploads/1/3/2/6/132695636/jiwimabakowixa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385633/normal_5fe5926cd1522.pdfIn PDF document text
    • https://bodovusinorone.weebly.com/uploads/1/3/5/3/135347185/aa105076333e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392649/normal_5fcc0d99cfcd3.pdfIn PDF document text
    • https://luxaxila.weebly.com/uploads/1/3/0/8/130814132/xudelizabasewapoxeka.pdfIn PDF document text
    • https://kedixusivazusug.weebly.com/uploads/1/3/4/8/134869684/sadonamufokuve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414680/normal_5ff1d49598fb2.pdfIn PDF document text
    • https://zofetofevikid.weebly.com/uploads/1/3/4/3/134337570/jomokobupasipila.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378379/normal_5ff7c2e4325dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428342/normal_602ab9643abf8.pdfIn PDF document text
    • https://xuwawimo.weebly.com/uploads/1/3/0/7/130739806/lojurolevowul.pdfIn PDF document text
    • https://novufetus.weebly.com/uploads/1/3/4/1/134131343/fugelevowe_sejufupogan_vadoti_moxafi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382778/normal_6027d220be8a4.pdfIn PDF document text
    • https://sejumajofejopib.weebly.com/uploads/1/3/2/7/132740214/fimar-tanatid.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/cce35b60-22a9-4788-aee7-7b84f2427f4f/zudabivipefisojudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53cda793-bcf4-4adc-88a3-5fac01955540/baby_groot_and_baby_yoda_t_shirt.pdfIn PDF document text
    • http://kilubediboxut.rf.gd/47017128539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63ae5064-33e4-487b-a83b-b552f28254fc/trane_ductless_mini_split_service_manual.pdfIn PDF document text
    • http://lanopeb.epizy.com/8734956090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9492b27-9d99-46c9-98f7-7d3d8f4d882c/zalijofolosiwuf.pdfIn PDF document text
    • http://wikeratofi.epizy.com/orpheus_and_eurydice_book.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_off0000ede0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE0 4952 bytes
SHA-256: 8bc50312ea35d40102c638df15170d91cf3d9835a443d635213f552b07599255
font_01_sfnt_off0000fedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDF 11092 bytes
SHA-256: 1c7869b330740668795ab8262be09cbfdb66d42fc2cfe01e1b2f479df7fe7645

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