Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f2d5b855eb8d63a…

MALICIOUS

PDF

77.3 KB Created: 2021-05-31 11:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0434ef86371b263c897e46444eb883e5 SHA-1: f3aa53838bca3055c38d9832b19d48893047c1d0 SHA-256: 7f2d5b855eb8d63ac2c84194a447cdb11c1cd6f5d2586aa0192f01a110b182f9
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external PDF files hosted on disposable domains. The primary URL suggests a lure related to Indian government acts, likely to attract unsuspecting users. The presence of many external links and the use of disposable hosting indicate a malicious intent to distribute further malicious content or engage in SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://seumenha.ru/wb?keyword=what%20is%20government%20of%20india%20act%201935%20in%20hindi PDF link annotation
    • https://baveretam.weebly.com/uploads/1/3/5/3/135314503/gipuxuzopabewi_viparegusotezo.pdfIn PDF document text
    • https://bizuzekibokosu.weebly.com/uploads/1/3/4/4/134446479/dafofozimuwad.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4461495/normal_60b049fa6afcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448719/normal_601559206971f.pdfIn PDF document text
    • https://nimizinimaji.weebly.com/uploads/1/3/4/7/134703428/dowema_segetofitewijam.pdfIn PDF document text
    • https://zezexofoji.weebly.com/uploads/1/3/4/3/134344156/lutidi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501659/normal_5fe8974ca90e2.pdfIn PDF document text
    • https://donefuvo.weebly.com/uploads/1/3/1/1/131164418/eaf8cdfe631b.pdfIn PDF document text
    • https://guvoxokogavi.weebly.com/uploads/1/3/4/3/134374443/5527405.pdfIn PDF document text
    • https://xedafiwiwez.weebly.com/uploads/1/3/2/3/132302754/ecc7a2f1f.pdfIn PDF document text
    • https://jewefero.weebly.com/uploads/1/3/1/3/131383264/wesiba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386084/normal_600dcdc13ac41.pdfIn PDF document text
    • https://wezenojaze.weebly.com/uploads/1/3/4/0/134095843/3841640.pdfIn PDF document text
    • https://futivodefumir.weebly.com/uploads/1/3/4/8/134861147/3460366.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463009/normal_6022c5929b1e3.pdfIn PDF document text
    • https://tamilazubi.weebly.com/uploads/1/3/4/6/134604156/3785e21fb.pdfIn PDF document text
    • https://xulisonifob.weebly.com/uploads/1/3/2/6/132695361/naxisikawufixo-voxotefuda-kojitugega-kaweniseguvedes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378623/normal_6015fee222e34.pdfIn PDF document text
    • https://vogavowaxataner.weebly.com/uploads/1/3/4/2/134266619/7345631.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427509/normal_604218eb98662.pdfIn PDF document text
    • https://puziwifatewir.weebly.com/uploads/1/3/4/7/134715637/6522019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372987/normal_606e6ce88404a.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/5a9901ee-1d0b-429c-a519-632948dfa929/80523970248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff2ed616-9195-4eae-a100-8a324f264ae7/el_nuevo_houdini_chapter_1-3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec5282ff-ef39-40ec-a173-7e4a91c747aa/percy_jackson_graphic_novel_full_set.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_off0000ef0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0D 5972 bytes
SHA-256: 87d827fbcf694ffe3969622fbce11c1fa79eafea70a47851c33ecc9f89b46e9b
font_01_sfnt_off00010350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10350 10736 bytes
SHA-256: 9eb254c0550c81e86742d81c03a4d6dcec4c6394fd786a289565b84c2c12eb7a