Malicious PDF — malware analysis report

Static analysis result for SHA-256 114a42b37c022ac9…

MALICIOUS

PDF

68.5 KB Created: 2021-03-24 08:57:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 5fb2e0db301ed4d2ac393b66a2d602bc SHA-1: f888247fc194da01bfe7f048ee6d8992a5a0324c SHA-256: 114a42b37c022ac90259085eb9b48d790e80a1d937a35baf386aa5428d38de6b
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm designed to distribute malware or phish for credentials. The document body, though heavily obfuscated, contains references to game hacks, likely serving as a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://vilenefex.ru/wix?keyword=dragon+city+hack+ios PDF link annotation
    • https://cdn.sqhk.co/vajirasavuz/gifaFhb/souza_sim_drag_race_mod_money.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/ehbTFJp/99578535112.pdfIn PDF document text
    • https://sekilulijafos.weebly.com/uploads/1/3/1/4/131438177/d93f4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421781/normal_5ff8ac0ab93df.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/XhFjf8I/the_lightning_thief_vk.pdfIn PDF document text
    • https://rasofenetiko.weebly.com/uploads/1/3/4/8/134862321/wegakewuwen-ritirixofi-bifonuvale-mudafokolusibu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475866/normal_604639bc014db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495691/normal_602dcfc8500db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480149/normal_5fdbd97a63a26.pdfIn PDF document text
    • https://reratedazakowim.weebly.com/uploads/1/3/1/3/131378897/gonelolifagirimus.pdfIn PDF document text
    • https://cdn.sqhk.co/xakatikakizi/idoij1W/gifegidoliwilo.pdfIn PDF document text
    • https://pemilixip.weebly.com/uploads/1/3/5/3/135330450/67d445.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://591e60e9-54e8-4b06-a9a7-f2e0522969d0.filesusr.com/ugd/1fd4b7_5282b9b1c8064c4daecfb39c68d4defb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dotivaf/48504339622.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/wapomiwixutuzekuxobejawe.pdfIn PDF document text
    • https://cc6d8859-fc08-4100-a073-55b48c5addfc.filesusr.com/ugd/238140_a97b243e738a40d99140811f8d0b406b.pdf?index=trueIn PDF document text
    • https://144ece88-722e-4d59-a9d1-ae16887514c2.filesusr.com/ugd/48b17f_640496d6310b4c6f8b3e9f919b4fded8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/midipes/99009095980.pdfIn PDF document text
    • https://88e92b2d-3ddf-41b2-a2ae-4af48bfba274.filesusr.com/ugd/b74686_d21a03eabd83445e8fed786022371926.pdf?index=trueIn PDF document text
    • https://926da24b-d3df-4aea-ac1b-ebdf7359a9e7.filesusr.com/ugd/fef925_d2c590b64f324ccf997dcf93ae3f8cf5.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD126 5196 bytes
SHA-256: 981658dbf02f64bcbda9079b6f4e7d49705a6983bdb23e4bba80961259397c99
font_01_sfnt_off0000e2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DA 9828 bytes
SHA-256: 3d83dbfd03dba2922363c0fd6e9345d313e24bc973ca70e39222c8a94ed7e10b

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