Malicious PDF — malware analysis report

Static analysis result for SHA-256 43762f2bb5ead8e4…

MALICIOUS

PDF

74.1 KB Created: 2021-03-31 08:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f513aef46b2b0fce95df99701ac873d3 SHA-1: 54fb0f1fa3872217429c0ec73064be4de2e41632 SHA-256: 43762f2bb5ead8e4d49dd0ddc63887aff6dec0b730104f6f214b0ce10e822c51
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam operation. The primary external URL, https://golowaki.ru/award?keyword=buck+boost+converter+design+pdf, is likely used to direct users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/award?keyword=buck+boost+converter+design+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409840/normal_603ad62f96a50.pdfIn PDF document text
    • https://cdn.sqhk.co/pozazoji/2idIhcR/71754825105.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445558/normal_600f5a51c617e.pdfIn PDF document text
    • https://cdn.sqhk.co/xafeperale/dpwgehg/sofifimobaropesuv.pdfIn PDF document text
    • https://cdn.sqhk.co/tufuboloruj/YIhigh5/fosufagisuxewulo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477155/normal_5ff2b48f0d156.pdfIn PDF document text
    • https://cdn.sqhk.co/sipobufiw/lhghg2Z/how_to_recognize_the_sculptor_sekiro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469375/normal_60038e0f210a3.pdfIn PDF document text
    • https://cdn.sqhk.co/mivezifov/FjcRger/70385262139.pdfIn PDF document text
    • https://cdn.sqhk.co/vamapoludi/hetjd3z/bmx_bike_racing_shoes.pdfIn PDF document text
    • http://givikoninebana.22web.org/bindiya_chamke_chudi_khanke_song.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380214/normal_5ffff404bb7e1.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/9jgNT65/35413169354.pdfIn PDF document text
    • https://cdn.sqhk.co/rarirawibowo/ZAhhmjb/kariku.pdfIn PDF document text
    • https://cdn.sqhk.co/xajegakagiz/xjgokge/xizokubemegomawepuku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5be7aec3-7d66-433b-ae1d-2bfb807ddf2a.filesusr.com/ugd/24deb6_ce1a9791a0404c7eb030c71229eaf3e4.pdf?index=trueIn PDF document text
    • https://75e6061f-eb7a-4ce8-b546-077bf96366c3.filesusr.com/ugd/2dfd19_de9e46dc5fc846238a6e5e35def7e679.pdf?index=trueIn PDF document text
    • http://darupaw.epizy.com/43282113186.pdfIn PDF document text
    • https://4fd47d7d-96cb-4cdc-943f-55997d715fc9.filesusr.com/ugd/ab3424_8bc1282814544752bdfd037b7a49b26b.pdf?index=trueIn PDF document text
    • http://tekisinasapev.epizy.com/amoebiasis_disease.pdfIn PDF document text
    • https://3b87a2b8-2d13-4e6d-acc4-cbba57692a59.filesusr.com/ugd/50988c_753be43682fb4b83b11e9545ea68cb70.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_off0000e30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30B 5396 bytes
SHA-256: 0d9547268b8dc5d6aefa297db3badadee02bbe153e99eab6f2db4aa209424a8f
font_01_sfnt_off0000f581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF581 10564 bytes
SHA-256: 850fbfec33a5e2c9d09333473d9e5b6f15fbf1bec2b55031fa1bbf8bae66dc22

Open this report in the interactive analyzer, or submit your own file for analysis.