Malicious PDF — malware analysis report

Static analysis result for SHA-256 a51aa2e778096ba6…

MALICIOUS

PDF

91.2 KB Created: 2021-03-25 10:01:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa299d0b60895c82e8a8de7d80c8345b SHA-1: d6bd5a1cdee14f42f86ac8e620b2e428be9a27c8 SHA-256: a51aa2e778096ba6ee866074391bcef65b473e1445497d935f3c9536cea21b40
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs. The embedded URL `https://lozipotod.ru/wix?keyword=biology+microscope+lab+answers` suggests a lure related to academic or scientific content, likely to trick users into downloading a further payload or submitting credentials. No scripts were extracted, but the PDF structure and embedded URLs point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=biology+microscope+lab+answers
    • http://acgmgroup.ru/17534565957q5ss1.pdf
    • https://pajenugemin.weebly.com/uploads/1/3/4/6/134677616/vezid.pdf
    • http://yourdesk.website/gotez3bhcz.pdf
    • https://cdn-cms.f-static.net/uploads/4423427/normal_6034e18c7abc8.pdf
    • http://kfnwejfnkwheklf.space/688936973glhpq.pdf
    • https://static.s123-cdn-static.com/uploads/4486197/normal_5ffba955b5ede.pdf
    • https://limofagis.weebly.com/uploads/1/3/4/6/134640762/genapopolado_pomek.pdf
    • http://shoop-ff.ru/income_tax_act_1961_amended_upto_datey6jk6.pdf
    • https://pibiwija.weebly.com/uploads/1/3/4/8/134896476/5577649.pdf
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/nabupuwojiwel.pdf
    • https://teligodinawam.weebly.com/uploads/1/3/4/4/134457670/puxawodi.pdf
    • http://requiredjokblog.com/ibps_crp_clerk_ix_syllabus_2019nm5ra.pdf
    • https://cdn-cms.f-static.net/uploads/4445532/normal_5fd1c1e2a7d5c.pdf
    • https://static.s123-cdn-static.com/uploads/4386622/normal_6001c44f7f7da.pdf
    • https://xeneniwavufew.weebly.com/uploads/1/3/2/8/132814439/2374320.pdf
    • https://mudulavodeg.weebly.com/uploads/1/3/1/0/131070753/8b35ecaae4a.pdf
    • https://xarupome.weebly.com/uploads/1/3/4/4/134469096/mawuletowedeke.pdf
    • https://cdn-cms.f-static.net/uploads/4420612/normal_600bf570ab65c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/55ea6fb3-1e23-4893-90fa-8f6402aa0df8/brookstone_earphones_reviews.pdf
    • https://uploads.strikinglycdn.com/files/511a0224-b123-4c0f-ba30-95f92c3fe20b/manual_de_organizacion_y_funciones_del_ministerio_publico.pdf
    • https://uploads.strikinglycdn.com/files/13306dbf-3e1f-4c79-b321-14834254613d/leputazezufasofidajeruzo.pdf
    • https://uploads.strikinglycdn.com/files/892c6a7c-ac7f-4f56-bc29-150ae9f4d2f0/7304413343.pdf
    • https://uploads.strikinglycdn.com/files/0f024382-a09a-4e16-9eb4-cb5c4e4baf91/yuntab_7_inch_tablet_reviews.pdf
    • https://uploads.strikinglycdn.com/files/ba4480f9-6a5c-48f1-9e45-b3c8febc6fce/vejifulikokodujazudu.pdf
    • https://uploads.strikinglycdn.com/files/4de435eb-08cb-4825-8dfe-6e6af8ae0669/19489939697.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001250b.bin
e66065ef71cab9316a0cc988bdef1e5ce146a46773d1797fc5a1ab3ee8af1eb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1250B 5636 bytes
font_01_sfnt_off0001383e.bin
70bdf47aa1472b412417831359569005644ba35ceac4fb1250318d083b22a80d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1383E 11472 bytes