Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f10c870cd69e218…

MALICIOUS

PDF

66.1 KB Created: 2021-02-02 06:50:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: a6bb4800f1d2b0bbd2d1b6f049416b22 SHA-1: 1f7960c3b6004521d727def8bc236f0b2561d6fc SHA-256: 0f10c870cd69e218c5b5dabcf2ce46d05ae8f2a3efb0824ba0194761597b535e
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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/aws?utm_term=code+asylum+android+gameplay In PDF document text
    • https://dugigoje.weebly.com/uploads/1/3/4/7/134754128/7590046.pdfIn PDF document text
    • https://bipokedofep.weebly.com/uploads/1/3/5/3/135322207/jupakojomuvise.pdfIn PDF document text
    • https://voluwunuzusiju.weebly.com/uploads/1/3/1/4/131452861/6597804.pdfIn PDF document text
    • https://bitusuverutito.weebly.com/uploads/1/3/1/8/131871453/e03b647954.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379732/normal_5fd60d4574bbf.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/wajufifenoxuj/last_chaos_assassin_skill_guide.pdfIn PDF document text
    • http://jajoxutevo.epizy.com/61095317879.pdfIn PDF document text
    • http://fuzezufomazo.rf.gd/amtech_prodesign_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/75027977988.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/kirizitek.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/didojexezogolotifigasok.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/arbitration_law_reporter_india.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/because_im_stupid_song.pdfIn PDF document text
    • http://wemubivoparuf.epizy.com/cardiology_guidelines_hypertension.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/naxanewifusedunilodazalol.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/nokia_android_one_launcher_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/basic_life_support_malaysia.pdfIn PDF document text
    • http://roxutudutupit.epizy.com/misule.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_off0000c4d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D0 5288 bytes
SHA-256: 21e424dd618196435b4b8c5e8f4e3661b234f9e3f184aca2e563de23483bd768
font_01_sfnt_off0000d6b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B6 10464 bytes
SHA-256: 5b5c1aac83ec8c532dc88c03d0bd18b84f37f245845eaac6231a84d1e398c041

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