Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0edc05d85ae4dbe…

MALICIOUS

PDF

84.8 KB Created: 2021-04-12 08:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f9c9db42a307dda782a3f62e14effed9 SHA-1: dd186327c08aab178c3fbca3aaf039d727a34a5f SHA-256: c0edc05d85ae4dbe030b1a65708209f6add8def3cac3b936e2803a7e9f466341
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of an SEO link farm designed to redirect users. The primary lure appears to be a link disguised as a YouTube search result, leading to a redirector URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=secret+teachings+of+all+ages+youtube PDF link annotation
    • https://mijutadozas.weebly.com/uploads/1/3/4/5/134590660/4246927.pdfIn PDF document text
    • http://takatoruwiseki.iblogger.org/71315022024.pdfIn PDF document text
    • https://fefokivaz.weebly.com/uploads/1/3/0/7/130776727/a4ac03ecc2f92.pdfIn PDF document text
    • https://leviwajij.weebly.com/uploads/1/3/1/6/131637177/4157680.pdfIn PDF document text
    • https://kenemujawov.weebly.com/uploads/1/3/4/6/134645985/23854a98b2.pdfIn PDF document text
    • http://kolometagavim.22web.org/91680531495.pdfIn PDF document text
    • https://lanudoda.weebly.com/uploads/1/3/2/3/132303217/rubiremisa.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
    • https://s3.amazonaws.com/bibejovixapis/1714460512.pdfIn PDF document text
    • https://332892e0-6a2b-40ad-946e-e7c92c61c867.filesusr.com/ugd/3e5d97_9bc5e510df2c4cd599a986a2d72c4c82.pdf?index=trueIn PDF document text
    • http://kifixawoxo.epizy.com/billyoh_shed_assembly_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/sentry_safe_key_will_not_open.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/5e_cavalier_guide.pdfIn PDF document text
    • https://ac09d6fb-20d1-47e2-97cb-2568fc137cdf.filesusr.com/ugd/03dcd4_1807a070e2404c7e867bb13a3e2c84d9.pdf?index=trueIn PDF document text
    • http://visuvowimew.epizy.com/23975351957.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/kilizenu.pdfIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_3e72fa97b02f4305882587da04b0b176.pdf?index=trueIn PDF document text
    • http://tutelewelar.rf.gd/vaxifuwabidozoforutax.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/29367129899.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10262 5368 bytes
SHA-256: 6f78266d264c51afe5543d516c383a65abc4bb50214ea607427d04f2c16c85b5
font_01_sfnt_off0001149d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149D 10464 bytes
SHA-256: 5dc3af64608b988062f298b5138147ca23aa2615a91e9f9204cc0b9b0173cbc7
font_02_sfnt_off00013824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13824 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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