Malicious PDF — malware analysis report

Static analysis result for SHA-256 4605e830d3a31848…

MALICIOUS

PDF

82.0 KB Created: 2021-01-13 15:08:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 27bec8349165b2e1b6cf8b2e29f6ae00 SHA-1: 1ea9c72252e2cee0bfdda57ff99ee9949d2b676c SHA-256: 4605e830d3a318483c5eead2c52368e061438862d930d441f691d8db0dbcfa95
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, indicating a link farm designed to redirect users to malicious sites. Heuristics confirm the presence of malicious redirector links and a link farm, with ClamAV identifying it as a phishing trojan. The primary attack pattern involves luring users through these links, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://cctraff.ru/123?utm_term=village+of+oswego In PDF document text
    • https://zilonuxe.weebly.com/uploads/1/3/1/6/131637529/xozej-vorode-vumusuwavufuke.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/fNgdnhe/774859663.pdfIn PDF document text
    • https://cdn.sqhk.co/jumibizede/hhijmLn/95906524000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5fa36f49a5a46.pdfIn PDF document text
    • https://cdn.sqhk.co/joxipadij/a1cjagi/77477822757.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450148/normal_5fd19287e36b4.pdfIn PDF document text
    • https://cdn.sqhk.co/likunubiba/etdHjhd/10757190990.pdfIn PDF document text
    • https://site-1174658.mozfiles.com/files/1174658/dead_zombie_shooting_target_zombie_games_3d_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/bidomutarili/jchaiel/umc_el_paso_salaries.pdfIn PDF document text
    • https://cdn.sqhk.co/munuseji/jhphegg/nebeledebe.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/hcL71ij/video_editor_video_maker_inshot_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464072/normal_5fa556994a938.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/o7jj2SM/transmission_jack_hire_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372354/normal_5ffdb2d6401fa.pdfIn PDF document text
    • https://cdn.sqhk.co/jafetegupam/sijEoid/biberafuremozamito.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA67 4896 bytes
SHA-256: 35b0bc8dd8688e2760918362a6a82b7b9a6283dca200e15fdf278e4c1b31e93e
font_01_sfnt_off0000fb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3D 1820 bytes
SHA-256: 006e80e85c4b14a55b9d4348249ee8c359b3bc7ea0110bdf2d7a62ce40a9e853
font_02_sfnt_off0001043a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043A 11712 bytes
SHA-256: ca13597f350fb892412dff2acdd8dd8673c0648ac90652a66b95aa581b936be1
font_03_sfnt_off00012bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BCC 6084 bytes
SHA-256: fabec606e516cf69f6dec6919936ba93b659fa13295e205095b57fc70665da06

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