Malicious PDF — malware analysis report

Static analysis result for SHA-256 93155129c7f85494…

MALICIOUS

PDF

79.5 KB Created: 2021-03-17 22:46:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 48c9ab7dd3d168f397078a57af19db41 SHA-1: d29080eda29bea780d3de7bfb1048c659b73a39b SHA-256: 93155129c7f85494a2694b9d77246d4effff543c9750274c8760c2863259e589
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to a domain associated with SEO spam and redirectors, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_UTM_REDIRECTOR_LINK heuristics. The embedded URL and the document body, despite being heavily obfuscated, suggest a lure related to 'keto shark tank' to entice clicks. ClamAV also detected this as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/wix?keyword=rapid+results+keto+shark+tank PDF link annotation
    • https://wapexuji.weebly.com/uploads/1/3/5/3/135329723/793ec.pdfIn PDF document text
    • https://janososa.weebly.com/uploads/1/3/5/3/135326085/8375386.pdfIn PDF document text
    • https://vakozumemarob.weebly.com/uploads/1/3/1/0/131070483/84e57e78da75fc3.pdfIn PDF document text
    • https://xekozetona.weebly.com/uploads/1/3/4/5/134508060/2bfc0e39bc2.pdfIn PDF document text
    • http://nevidulipegu.22web.org/bapererovo.pdfIn PDF document text
    • https://wuvekodufunat.weebly.com/uploads/1/3/5/2/135298648/4783088.pdfIn PDF document text
    • https://razitesewiwi.weebly.com/uploads/1/3/2/8/132815022/punedu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/widofafane/wholesome_baby_food_guide.pdfIn PDF document text
    • http://webuguvafu.rf.gd/applied_mathematics_and_information_sciences_scopus.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/mevduat_bileik_faiz_hesaplama_forml.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/63932393662.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/vehicle_information_report.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/51765134808.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c290554-ecff-4087-863b-ccf59d4632d8/peavey_classic_50_212.pdfIn PDF document text
    • http://divejekojo.epizy.com/jenavomaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20f602d8-ea57-4432-ad76-77226deeb1e4/44180714448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8989edea-11e3-4a69-84ee-0c8b0e3cbeae/84268717644.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/lufedazujopulewixosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66005373-c5e7-4965-b21f-76279726a76b/thus_spoke_zarathustra_kaufmann_audiobook.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/scrivener_3_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/collision_coalescence_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/bad_bicep_curl_form.pdfIn 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_off0000f7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CC 5120 bytes
SHA-256: eb9465c6dc83744776dd5ad4caa612b386dd620cb0d25329b79d9a883a38633a
font_01_sfnt_off0001092b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092B 12492 bytes
SHA-256: e6d478da0b39c05b6f7cc287d829b5205bb5a9b6dece26786c5609f290411e94