Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b92a1ecc076e14c…

MALICIOUS

PDF

73.5 KB Created: 2021-02-10 13:21:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 10fb8999b012ad440e24cc7cf989bdbe SHA-1: 66b33729069eebfee4a8592f5288947f6535d7e2 SHA-256: 7b92a1ecc076e14c8371114f7b8d1b8fae15e05977185b8804df39ed9f5f64cb
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/square?utm_term=autodesk+revit+beginner+tutorial+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4529697/normal_5fe3a09832c38.pdfIn PDF document text
    • https://jokuvaput.weebly.com/uploads/1/3/4/5/134589987/4754361.pdfIn PDF document text
    • https://natulawud.weebly.com/uploads/1/3/4/3/134309077/xoxefade-povudewov.pdfIn PDF document text
    • https://motabuwupogofe.weebly.com/uploads/1/3/1/6/131607229/jubebijonolixarawove.pdfIn PDF document text
    • https://cdn.sqhk.co/surodamiz/eG3Fhgi/chess_online_duel_friends_online_apkpure.pdfIn PDF document text
    • http://xofajenakimexo.iblogger.org/cove_guide_darkest_dungeon.pdfIn PDF document text
    • https://murimuwisoruda.weebly.com/uploads/1/3/4/0/134017177/pafibotixalowox_dunegasuv.pdfIn PDF document text
    • https://cdn.sqhk.co/jepivitixiwo/ifjeyJm/karonawuweji.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/Djdaqyz/46783658965.pdfIn PDF document text
    • https://cdn.sqhk.co/wajidafix/ifjdvgP/final_fantasy_7_original_tips.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/xakapudakadu/62544078540.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/chambers_netflix_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/18771666443.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/musor.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/5640478485.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/afro_tech_house_2018.pdfIn PDF document text
    • http://nepowabut.rf.gd/simple_carburettor_working.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/38879259582.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_off0000e285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE285 5460 bytes
SHA-256: d48d4793681f9a98f65b7f8246ac10fa89de13dbdf76ec52b81baa475214d810
font_01_sfnt_off0000f52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52F 10396 bytes
SHA-256: 4d8f6496b6fa4b2f1caf5cf3189f982f8c79a8c7e0eb0782385a18ec20e09780

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