Malicious PDF — malware analysis report

Static analysis result for SHA-256 e97306aff224cbc6…

MALICIOUS

PDF

84.0 KB Created: 2021-03-27 15:22:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f3d5213864953c29bf9c20a28945ae63 SHA-1: dafccb991028123228cc7a161eb91dedd8d8e951 SHA-256: e97306aff224cbc6578c685f2280a29cfdf5ae99aeb448812380fee04908b8a1
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, many of which are identified as malicious redirectors or part of a link farm designed for SEO manipulation. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful content, likely for credential harvesting or further payload delivery.

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
  • 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/wix?keyword=biology+eoc+review+packet+answers+2017 In PDF document text
    • http://keniworu.mywebcommunity.org/58981530990.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/boulevard_of_broken_dreams_guitar_tab.pdfIn PDF document text
    • http://tozepefaj.iblogger.org/cbs_all_access_canada_apk.pdfIn PDF document text
    • http://zasazigupat.getenjoyment.net/nurosoli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496828/normal_5fe0d4a797991.pdfIn PDF document text
    • http://tokivaburag.22web.org/atm_complaint_form_ubi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475864/normal_5fca2e6c81281.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e5720c39-3c1c-4a52-9be9-509675281b5a.filesusr.com/ugd/0010c8_9b7f664db857448e8daaa87c97f739f7.pdf?index=trueIn PDF document text
    • https://b3709dad-42f4-4621-9b7e-74d31ca978cd.filesusr.com/ugd/f91cf1_c0f6e04f94004ff8b1cfe412fb03b494.pdf?index=trueIn PDF document text
    • https://c4fca8c4-0f54-45c3-ae88-320069d86c16.filesusr.com/ugd/ac0d21_899cd402c95749689b9f63ec8999b0c2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/febopa/award_bios_flash_utility_dos.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/dojosoxuwu.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/sole_e35_elliptical_for_sale_used.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/rimupafewemoluxixaso.pdfIn PDF document text
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_6981a61b902843299c5eafa82a3e0749.pdf?index=trueIn PDF document text
    • https://e905e09d-7ddd-4aab-833c-73500e817873.filesusr.com/ugd/f4c08b_0e8d43e3eb1c43009a7c2a7382987bf3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/basic_excel_formulas_list.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/activator_windows_7_2019.pdfIn PDF document text
    • http://buwafizu.rf.gd/farmaci_anestesia_generale.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/91102918688.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE498 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off0000f48c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48C 5872 bytes
SHA-256: 440a46ffe34b9a459efd2f500a4d66f75244637b200cc906f8f1fe5cb5e8f301
font_02_sfnt_off000108cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CC 10836 bytes
SHA-256: 69d887e670504bc5005ceff8245405d45060dd529e43fdcec010af45e8cdaf3c
font_03_sfnt_off00012d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9D 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb

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