Malicious PDF — malware analysis report

Static analysis result for SHA-256 14627bbcb174ff51…

MALICIOUS

PDF

89.2 KB Created: 2021-03-18 02:36:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4872c87660ce730a385be07caac2c55e SHA-1: 99537e3be9da93b17cee577894c726cbecc6b671 SHA-256: 14627bbcb174ff5121f9f862518982c26e285f51e8b4c2a5f4ca9114553d509b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/wix?keyword=zoom+g1x+manual+pdf
    • https://dibapanapuro.weebly.com/uploads/1/3/0/7/130776085/5717541.pdf
    • http://gofipupeseg.22web.org/wegenabewakimi.pdf
    • https://sisuveraxom.weebly.com/uploads/1/3/2/7/132740665/5149425.pdf
    • https://kaginugopaz.weebly.com/uploads/1/3/4/3/134310825/dixiwezusogel.pdf
    • https://ravixibede.weebly.com/uploads/1/3/4/5/134584659/vevifelud.pdf
    • https://susawodaf.weebly.com/uploads/1/3/2/8/132814942/vuxekiwovim.pdf
    • http://vafenofu.22web.org/history_of_behavioural_science.pdf
    • https://lirefabagobaxi.weebly.com/uploads/1/3/4/0/134012393/fomomebufitiwo.pdf
    • https://lugafowak.weebly.com/uploads/1/3/4/6/134647172/8924925.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://5f98d79b-b704-4ecc-a618-200e52db7f79.filesusr.com/ugd/d1a5b7_94640a45d1994e62abcd6ec430447b89.pdf?index=true
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_6f917a89472c4174a1d8ba5f2e065a7d.pdf?index=true
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_e59280e4520347d397e2a7b392dad1ff.pdf?index=true
    • http://rilefup.epizy.com/19843485490.pdf
    • https://s3.amazonaws.com/tipikaxe/corrugated_metal_roofing_sheets_installation.pdf
    • https://6bfd3344-23d3-4e03-ab7d-00c1c23eecf6.filesusr.com/ugd/be19e1_3f3fe32c521c49dc94e9a3dbd18b360f.pdf?index=true
    • https://s3.amazonaws.com/godoremitiwuja/carcinomatosis_peritoneal_2018.pdf
    • https://s3.amazonaws.com/davubewu/48360854352.pdf
    • https://09235f31-469a-4613-94fc-36d04c1f642a.filesusr.com/ugd/8b6407_1fadec67309c4b2ab80e3628004c043e.pdf?index=true
    • http://vujomafo.epizy.com/how_to_use_ikea_oven.pdf
    • https://s3.amazonaws.com/patilawasu/adverb_of_time_lesson_plan.pdf
    • https://d3919fa5-c020-464c-a773-72e456e10464.filesusr.com/ugd/29136f_3e976c4bcf094613ac610eba4ea3545d.pdf?index=true
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_33b8a58b6db44d48bf4445582a31c7b4.pdf?index=true
    • https://ae8c1479-5121-4009-b0ed-8259dbb1205b.filesusr.com/ugd/0aff45_8f4142f55bbb407380d637e29c7360fd.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010beb.bin
2bacdc599bcab868245640e70d9df85cf549fdc20e29467679914eaf87663dee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEB 4800 bytes
font_01_sfnt_off00011c34.bin
e620188f712d24c8b3a1482dadfb653a7a0dff71ad10389be1e0857153561c16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C34 13820 bytes
font_02_sfnt_off0001493a.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1493A 4324 bytes

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