Malicious PDF — malware analysis report

Static analysis result for SHA-256 89662ab78d02d1c3…

MALICIOUS

PDF

80.2 KB Created: 2021-01-13 14:15:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d9508a1bb67397c9ba01fe7c8b94024b SHA-1: 242d1861ae5fd34d45d7c5a7d2cf41a869bca101 SHA-256: 89662ab78d02d1c362008d1cb6f12df9de9980c26b51d181a4620d9499745a07
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting services and redirector infrastructure. The primary lure appears to be 'coin master hack apple', suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • 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://traffine.ru/wb?keyword=coin%20master%20hack%20apple In PDF document text
    • https://sefubokadizafa.weebly.com/uploads/1/3/4/8/134880044/9efaa7fa910c393.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/loxitoza.pdfIn PDF document text
    • https://site-1175781.mozfiles.com/files/1175781/line_graph_definition_in_graph_theory.pdfIn PDF document text
    • https://cdn.sqhk.co/sadetujadufi/A7Djdge/dingus_egg_mtg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383792/normal_5f993610b6e0f.pdfIn PDF document text
    • https://vevifogenumij.weebly.com/uploads/1/3/4/6/134626850/3873413.pdfIn PDF document text
    • https://site-1239330.mozfiles.com/files/1239330/keylab_49_essential_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/jjijjjT/girl_bands_of_the_late_90s_early_2000s.pdfIn PDF document text
    • https://site-1168101.mozfiles.com/files/1168101/70281388194.pdfIn PDF document text
    • https://cdn.sqhk.co/gimexigerub/KihgiaW/stretches_for_flexibility_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/lumozupa/jbjbgid/lewazozurolobodupawijegax.pdfIn PDF document text
    • https://vimefipivarek.weebly.com/uploads/1/3/4/3/134310944/68ade3d9d4.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://www.daltonmaag.com/In 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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF3 5048 bytes
SHA-256: 99808d56dad5b1a1ee0e071fcbbd2b80df5ee286bd6af847de7fa122c3b6f720
font_01_sfnt_off0000cfd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD4 9416 bytes
SHA-256: f14eeb8fb6bd1fa1b9575d171291b3a02d8d3d984d67549fd9bd63e004efa514
font_02_sfnt_off0000ea2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2F 11112 bytes
SHA-256: a76750cd915ea21da6846b8de457184394f9ae66476167051c33167b9434649a
font_03_sfnt_off00010f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8B 16380 bytes
SHA-256: 2e1dcfa215ff7068e156f9bca6f25e666cb310e753e20272ef9c89573ef626fa
font_04_sfnt_off00012540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12540 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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