Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e2358646ef36488…

MALICIOUS

PDF

81.0 KB Created: 2021-03-16 18:28:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 3c994f7c91ddbf9bbb3d4424ca4506ea SHA-1: 93ccf53ddb5b0279b2a953d8b20acb6f0069cb16 SHA-256: 1e2358646ef364880d13903907590afbc6023d1ff585efcfbade9c84d31eec94
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains or link farms, indicating a phishing or SEO spam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://leonvi.ru/award?keyword=the+architecture+of+the+city+aldo+rossi+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/tememukafosu/ihsiiie/lezakimoruregof.pdfIn PDF document text
    • https://cdn.sqhk.co/vegapagir/ijiA0ie/annamalai_university_engineering_application_form_2019.pdfIn PDF document text
    • https://kirorasonosa.weebly.com/uploads/1/3/4/7/134743937/428dab32.pdfIn PDF document text
    • https://kabuvegezukab.weebly.com/uploads/1/3/5/3/135325093/2281349.pdfIn PDF document text
    • https://fefedajukuda.weebly.com/uploads/1/3/1/0/131070841/wakipizadexidivufo.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxubefe/BjaZbif/star_wars_galaxy_of_heroes_mods_optimizer.pdfIn PDF document text
    • https://kumuxabe.weebly.com/uploads/1/3/4/6/134670594/be6569a4515c618.pdfIn PDF document text
    • https://kagopibuxewiki.weebly.com/uploads/1/3/1/3/131398156/paloxesojumuzivaren.pdfIn PDF document text
    • http://piredvizhnik.com/zudujapefupobebas35gn.pdfIn PDF document text
    • http://physcoo.com/what_religion_means_to_mewucqq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462339/normal_5fe5ebba5b301.pdfIn PDF document text
    • http://erogan-columbia.site/fufemu4us2h.pdfIn PDF document text
    • https://vozapevozatoka.weebly.com/uploads/1/3/4/0/134097066/nisipabupogamiz.pdfIn PDF document text
    • https://cdn.sqhk.co/genazeres/fSSKmHR/kovozowanufuzezar.pdfIn PDF document text
    • http://lassituda.online/how_to_factory_reset_netgear_prosafe_switchhu0iy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403117/normal_5fc847d3550d9.pdfIn PDF document text
    • http://extraterrestrials.space/91995962220zk99.pdfIn PDF document text
    • http://vvinorama.fun/libebumi9fsh2.pdfIn PDF document text
    • http://indital.fun/246608750825xeoz.pdfIn PDF document text
    • https://cdn.sqhk.co/zezaxemepe/gQmjfSI/79344557056.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_603313b6ed172.pdfIn PDF document text
    • http://alcexpress3.xyz/microsoft_bluetooth_mouse_3600_driverb5sch.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE734 5384 bytes
SHA-256: 6eed6b19591d92675257e8416ee1ac2bcac2c73deb538823a17fa01a25877acf
font_01_sfnt_off0000f99c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99C 11584 bytes
SHA-256: 3b0a2f2c4feb4dd4a0fccb3f1f6b2fa118637a851beaecb97b7565ade20589f6
font_02_sfnt_off0001212c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1212C 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90