Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7539e0a98f9ff84…

MALICIOUS

PDF

87.9 KB Created: 2021-05-25 09:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0085acd21018b2eab86a4eb0e145f227 SHA-1: f197273317d5cde36d315d4170d59b1a4d1cee3f SHA-256: f7539e0a98f9ff843e3ac38d7fd70664c91f725d66b2fa095f49162b210f813a
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 point to other PDFs, suggesting a link farm or redirection mechanism. The primary URL, 'https://midufefew.ru/strik?utm_term=teekshna+damstra+kalabhairava+ashtakam+telugu+pdf', appears to be a lure, potentially leading to a phishing site or malware download. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/strik?utm_term=teekshna+damstra+kalabhairava+ashtakam+telugu+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450630/normal_5fe461d4c8b7a.pdfIn PDF document text
    • https://nanufuso.weebly.com/uploads/1/3/4/4/134443711/mufovevivijupasavop.pdfIn PDF document text
    • https://gaxatibixowoki.weebly.com/uploads/1/3/1/4/131452935/516d1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447086/normal_600e287504cd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_603713f1f0b71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490738/normal_605657936b814.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403556/normal_5fd2ce3bae241.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380695/normal_5ffb92aab8ea0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412909/normal_606bfc4521040.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489615/normal_604cf0238a64e.pdfIn PDF document text
    • https://pipulelinukebe.weebly.com/uploads/1/3/4/3/134364851/0cf74d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420245/normal_601ca1ddc3ab1.pdfIn PDF document text
    • https://dusomekekonipa.weebly.com/uploads/1/3/4/5/134580960/3b32ae1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444648/normal_5fdeb5390c8b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505699/normal_606e3ef1b1a98.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e97a4ea-a1fb-43fe-ae7e-a8a8e1e48231/how_to_make_avanti_mini_fridge_colder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a74676c-2952-43e0-833b-75b0c99007f3/singular_possessive_nouns_worksheet_for_grade_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c13aa31-5a61-4d12-abc0-b1c747b1dcbe/over_the_rainbow_ukulele_chords_youtube.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE761 5668 bytes
SHA-256: 80c348914344efb2c29e393ca0c9240968dd49b9b7bbd3ef57dfbbe119c8ff39
font_01_sfnt_off0000fa7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7E 14484 bytes
SHA-256: c830c5533a1c32e929cfaa18163c5a2d7d3cbc6c89229974f106a98a8071e7cc
font_02_sfnt_off00011f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F64 10388 bytes
SHA-256: a44b9e62628e7c3d055bb736b6f9381a1112f098263403eb301520fe459820ee
font_03_sfnt_off0001433b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1433B 3068 bytes
SHA-256: 9804169037ecfecf1c63dfef337e18ecbecc96bc43a052ffef4e96b028ae5985

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