Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a955a1efb7d85ca…

MALICIOUS

PDF

86.5 KB Created: 2021-03-15 14:37:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: bc885f6c919cbe113e610e7ac4e4b60d SHA-1: b7919087d9e0b41b2c9fc5b0998b20fa867341aa SHA-256: 8a955a1efb7d85caf0c9f73b712cb6144a3a86be39313790efc1640381beed70
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics and a machine learning classifier, including ClamAV's Pdf.Phishing.Trojan signature. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on disposable domains. The embedded URLs and the PDF structure suggest an attempt to manipulate search engine results or direct users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=iphone+lifeproof+fre PDF link annotation
    • http://begetus11ppz.xyz/how_to_pray_to_get_married_soon0ejc4.pdfIn PDF document text
    • https://dixoparogazasa.weebly.com/uploads/1/3/1/8/131871726/sopoz.pdfIn PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/1289242.pdfIn PDF document text
    • https://mepolelo.weebly.com/uploads/1/3/4/6/134626310/7078911.pdfIn PDF document text
    • https://wobomiti.weebly.com/uploads/1/3/4/5/134501920/zulumari.pdfIn PDF document text
    • https://wapubepedud.weebly.com/uploads/1/3/1/4/131455956/wiposuposad_jepuzipi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490116/normal_602c9f8195caf.pdfIn PDF document text
    • http://ita-bio.space/exercices_sur_le_groupe_nominal_cm14zyy6.pdfIn PDF document text
    • http://sunny-web.ru/bapopilabavol88gpd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481839/normal_60026fd8a735f.pdfIn PDF document text
    • https://xunatopek.weebly.com/uploads/1/3/2/7/132710497/pegujipuxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_601d502237214.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5fe8e7dbd7405.pdfIn PDF document text
    • https://xexonuza.weebly.com/uploads/1/3/4/3/134305788/nepimufafuz_xuwuwiguserexi_golilulululegap.pdfIn PDF document text
    • https://burigazipe.weebly.com/uploads/1/3/4/7/134764527/58dbdb7.pdfIn PDF document text
    • http://shoes-storie.club/50_shades_of_gray_book_release5qa1l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450251/normal_5feaef7205eb7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://povuputuk.epizy.com/palma_wallpaper_for_android.pdfIn PDF document text
    • https://441768bb-9839-4df4-8f78-dd1233b527f6.filesusr.com/ugd/7e6080_36f7c9df344b4207b3038707c6eca55a.pdf?index=trueIn PDF document text
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_51f00439ab8b47438b31e7acb2510487.pdf?index=trueIn PDF document text
    • http://burijudipo.epizy.com/photoshop_ohne_creative_cloud.pdfIn PDF document text
    • http://losobome.rf.gd/lovuvajubodat.pdfIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_076520a7f8974777ab91e94212c80dcf.pdf?index=trueIn PDF document text
    • http://rozakoxufe.epizy.com/twitch_after_effects_plugin_free_mac.pdfIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_fcbb930165844903b590e7b58db0686d.pdf?index=trueIn PDF document text
    • http://modimuvamut.epizy.com/41761011359.pdfIn PDF document text
    • https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_5b302a995bb54017aff65491cc5df507.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10903 4248 bytes
SHA-256: 100c1cadbea7253baf37a8269114fa3c5c6d7e9a999d052bbf4672e5eee27e66
font_01_sfnt_off0001173d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173D 11084 bytes
SHA-256: bffed1dc056db9560c1bbc3a6fcb4fdcbaf224f4261cfd0bbdcbfc4b114b85de
font_02_sfnt_off00013d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D01 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c