Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aabd147bb4784b7…

MALICIOUS

PDF

67.8 KB Created: 2021-02-21 04:39:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 03f93ab68badfa57f6f8acbcddd6e2c7 SHA-1: 61ea6b1762f815676324c61e734c4295a08ba926 SHA-256: 5aabd147bb4784b7ceb683e2296f77197119e399c3bdda5a56ca2c24153109e4
254 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=social%20media%20marketing%20plan%20for%20restaurants%20pdf In PDF document text
    • https://vakogiguwowokel.weebly.com/uploads/1/3/0/7/130775334/a65f66738.pdfIn PDF document text
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/wodiputen.pdfIn PDF document text
    • https://nesibebinirudeb.weebly.com/uploads/1/3/5/3/135311353/xotoraxomewesew-xiludatox-sowolareviduxi.pdfIn PDF document text
    • https://neseroto.weebly.com/uploads/1/3/5/3/135326238/c9fe30f41.pdfIn PDF document text
    • https://cdn.sqhk.co/vivakawibaki/aTic1hj/download_zombie_gunship_survival_unlimited_gold.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/igfgjhj/73472921523.pdfIn PDF document text
    • https://xoxebugifujame.weebly.com/uploads/1/3/4/4/134478015/wisaz.pdfIn PDF document text
    • https://cdn.sqhk.co/mumesimasozo/rzLijWK/98874099901.pdfIn PDF document text
    • https://cdn.sqhk.co/sofaxuleruri/RFkMxV4/92031099524.pdfIn PDF document text
    • https://nudadisaxoge.weebly.com/uploads/1/3/4/0/134018155/dozinefezukanul_dafuba_xudir.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/wewiro/irrevocable_power_of_attorney_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/dish_network_guide_font_size.pdfIn PDF document text
    • http://bigofufujenu.epizy.com/62920222020.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/kalusonuv.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/gokawilir.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_off0000cdc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC2 5640 bytes
SHA-256: 3ca127187457acafe86037abf66ef08277360a640c1842bcb5648db4f70eeaf0
font_01_sfnt_off0000e0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E9 9744 bytes
SHA-256: b2192b65056a92c133e497c30344c21ab9cea2c8a9f05a1ecfb855097792483c

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