Malicious PDF — malware analysis report

Static analysis result for SHA-256 87ea5f1ef6524f1e…

MALICIOUS

PDF

89.7 KB Created: 2021-03-07 07:28:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f6ffcc05324b511e1b38975558aefe55 SHA-1: 255603f660babc00c3dfc314e5c8f2a7ec744871 SHA-256: 87ea5f1ef6524f1e2c600341e4f991e25023f9cfb426f5cc2f86bab922d232e9
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF document exhibits characteristics of a phishing or social engineering attack, indicated by the 'SE_CLIPBOARD_COMMAND_LURE' heuristic. The document's content, though partially obfuscated, suggests it instructs users to interact with command-line interfaces. The presence of numerous external links, many pointing to disposable hosting or link farms, further supports a malicious intent, likely to redirect users to malicious sites or download further payloads. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://fokemale.ru/aws?utm_term=windows+troubleshooting+commands+pdf PDF link annotation
    • http://graatorama.space/80818987598kiib4.pdfIn PDF document text
    • http://sun-italy.space/604357123811suqk.pdfIn PDF document text
    • https://simisasokudu.weebly.com/uploads/1/3/4/2/134235492/471404.pdfIn PDF document text
    • https://kuxobemif.weebly.com/uploads/1/3/1/3/131379353/mewaruxuxuzez.pdfIn PDF document text
    • http://bestplacefor.rest/7992019886u1h9g.pdfIn PDF document text
    • https://bawokotofebadu.weebly.com/uploads/1/3/4/5/134507933/278e4fc237a77d.pdfIn PDF document text
    • https://puxezemugip.weebly.com/uploads/1/3/4/3/134311794/5c2b5a6fe4797a.pdfIn PDF document text
    • http://detonicufficiale.website/zuwumuvig21f9o.pdfIn PDF document text
    • http://kavelizopepi.mywebcommunity.org/zovimipi.pdfIn PDF document text
    • http://radogomi.mygamesonline.org/descargar_biblia_de_jerusalen_gratis_en_espaol.pdfIn PDF document text
    • http://italywow.pro/bonowaniputi5wwsy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_b883d76e6f424c319ee6ef40db24a7bd.pdf?index=trueIn PDF document text
    • http://filoroxesofe.rf.gd/is_5x5_workout_good_for_beginners.pdfIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_1f34b88f0b994c438d0848becae64c78.pdf?index=trueIn PDF document text
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_b9d7e4d77f514def94878481b3e6aad1.pdf?index=trueIn PDF document text
    • http://sisigetevi.rf.gd/stefflon_don_hurtin_me_audio.pdfIn PDF document text
    • http://pozidijapepore.atwebpages.com/xedebafufo.pdfIn PDF document text
    • https://e432c3f7-acc0-403b-bc7f-1b8c16782643.filesusr.com/ugd/6a4899_9265a7f41a114b719115bbf40fc1e749.pdf?index=trueIn PDF document text
    • https://7722bba5-72ad-4d15-a72d-9ce9fbdcf1b5.filesusr.com/ugd/772ad5_d619e0c117024a2fa397411448ae87e2.pdf?index=trueIn PDF document text
    • https://5e9c932d-19a8-4d5a-a970-d4bc0bcb832b.filesusr.com/ugd/bae0a0_ccd44f9f0e6e45579ac467a844640c33.pdf?index=trueIn PDF document text
    • http://rozopujonabesix.epizy.com/6724933943.pdfIn PDF document text
    • http://nuluwajewugutik.onlinewebshop.net/cul_es_la_dosis_de_metronidazol_para_adultos_250mg.pdfIn PDF document text
    • https://b56e6f12-3f4b-4b75-bc29-9585eb3fba71.filesusr.com/ugd/73f0dd_c1a83ac88cde4de6928e7033a8376ff1.pdf?index=trueIn 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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B8 5812 bytes
SHA-256: a6f4949f590e83bc2676aa707f1c62bf6fc7cc3e57d7b2cbd76a3134a10d1945
font_01_sfnt_off00011d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D65 8244 bytes
SHA-256: b6069bab69281fd1f4c0b2cc0030c170571a4ceedde13f3d37719cbf6f5f2a16
font_02_sfnt_off0001346c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1346C 10756 bytes
SHA-256: be5a02c00e1ed8957aaad0005d96f878c89506f62da3608cb04e4bc7c76b2118

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