Malicious PDF — malware analysis report

Static analysis result for SHA-256 f14fa595e9446f18…

MALICIOUS

PDF

135.9 KB Created: 2021-01-10 01:47:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d8903e2e2bce4fbe8a1e92fee2c57633 SHA-1: 2965cccb5ca1b50efffc68be320fa26c438f5893 SHA-256: f14fa595e9446f18e1637fe126c3bed203e966db10d148b06898e582fcd8268c
184 Risk Score

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics and a machine learning classifier. It contains numerous embedded URLs, with at least one pointing to known malicious redirector infrastructure. The document appears to be a link farm designed to direct users to potentially harmful websites, likely for phishing or malware distribution. No scripts were extracted, but the presence of embedded URLs and the link farm heuristic strongly suggest a redirection-based attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=spun+off+urban+dictionary In PDF document text
    • https://patinijogu.weebly.com/uploads/1/3/4/8/134854147/7418201.pdfIn PDF document text
    • https://site-1178961.mozfiles.com/files/1178961/72349169750.pdfIn PDF document text
    • https://site-1173833.mozfiles.com/files/1173833/super_island_god_vr.pdfIn PDF document text
    • https://site-1180330.mozfiles.com/files/1180330/microsoft_teams_for_mac_not_working.pdfIn PDF document text
    • https://sezemizom.weebly.com/uploads/1/3/4/6/134622585/vosojasum_nerapezuzez_rorugomiluxop.pdfIn PDF document text
    • https://site-1234112.mozfiles.com/files/1234112/tonisinimigabewuloreg.pdfIn PDF document text
    • https://site-1168360.mozfiles.com/files/1168360/helix_jump_2_kizi.pdfIn PDF document text
    • https://site-1173983.mozfiles.com/files/1173983/rc_plane_plans_free.pdfIn PDF document text
    • https://dexoxewivovevub.weebly.com/uploads/1/3/4/3/134322619/relusovan-gowekijufimo-netumonepigosi.pdfIn PDF document text
    • https://cdn.sqhk.co/pibutuvopedu/jgH3ghr/noco_genius_gb70_boost_hd_jump_starter_review.pdfIn PDF document text
    • https://site-1176782.mozfiles.com/files/1176782/smithsonian_channel_plus_shows.pdfIn PDF document text
    • https://site-1177610.mozfiles.com/files/1177610/modern_home_design_house_construction_games_3d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://fedorahosted.org/lohitIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0001cdbe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1CDBE 26816 bytes
SHA-256: da9d9affe718ea0c84136b0e1897ec8d07f19c7518f939157b7e041d999cf635
font_00_sfnt_off00012677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12677 15172 bytes
SHA-256: 46c8da27cf8b4893683fe7c50ea71a7611b2f997f24665f5ccec8e6fcf72d6c7
font_01_sfnt_off000157a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157A3 5284 bytes
SHA-256: cf0a2e8d6d9a9e1f7b5281a193ffedc558dfdfc5fde1534db66586963e38b68f
font_02_sfnt_off000169a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169A8 9268 bytes
SHA-256: 74d8e100a246670d29ac47111e9edc812afb3c662c335c3c5bea00f19cffb449
font_03_sfnt_off00018339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18339 27732 bytes
SHA-256: d5830b87e544430c8b761d4139e4eb713c40bb3a99412a28967f737c2608b818
font_05_sfnt_off0001fcf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FCF9 5096 bytes
SHA-256: d71bf393caff93646fd090458d3e2262199282f526620c31cc455c038f3f81e8