Malicious PDF — malware analysis report

Static analysis result for SHA-256 27f0cafcb8713100…

MALICIOUS

PDF

93.9 KB Created: 2021-01-17 02:51:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6ca28b1dab7d807559cc6a18197110b7 SHA-1: 1443c96b526026b420788b438a7ddd0cdafc89b7 SHA-256: 27f0cafcb871310039a3e725532cced51b305de1c74bfbf6d9ca837731d2c246
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains multiple embedded links that redirect to known malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, appears to be a lure related to 'champion ring display case'. The presence of numerous links on disposable hosting services further supports a phishing or scamming intent. No scripts were extracted, but the primary attack vector is the redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://traffmen.ru/123?utm_term=champion+ring+display+case In PDF document text
    • https://site-1172306.mozfiles.com/files/1172306/colors_that_go_with_purple_and_gold.pdfIn PDF document text
    • https://mikuloxituxawe.weebly.com/uploads/1/3/1/4/131410747/rimiwi.pdfIn PDF document text
    • https://jawuvufos.weebly.com/uploads/1/3/4/8/134856807/vuzivesiva-suduf.pdfIn PDF document text
    • https://zalidumi.weebly.com/uploads/1/3/5/3/135351231/xonamubar.pdfIn PDF document text
    • https://site-1242392.mozfiles.com/files/1242392/93764218541.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447885/normal_5fecc6e11b9bd.pdfIn PDF document text
    • https://site-1215079.mozfiles.com/files/1215079/98616023733.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427501/normal_5fb2b8493dd88.pdfIn PDF document text
    • https://site-1172287.mozfiles.com/files/1172287/surerut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393026/normal_5f9918e815025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460043/normal_5fd92e8c25e98.pdfIn PDF document text
    • https://mulevemi.weebly.com/uploads/1/3/4/7/134754511/pibom_gutoj_fanixovoreza_zofosubavope.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gumagabu/biryani_telugu_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/37203278393.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://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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001325a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1325A 23532 bytes
SHA-256: f72c62bc35323e395c68607b551fc021e7ee07d1487dabe740b419eea3c1133a
font_00_sfnt_off0000f6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CF 5320 bytes
SHA-256: 87278795411ae5f2151c2009ae58e2656c7c59e98a1d716b1118b132ce1bc782
font_01_sfnt_off000108b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B7 12160 bytes
SHA-256: 6a04407c0ac03dfd837c0775eae96fa789b0f250b9bbddccf818cac553ff4184
font_03_sfnt_off00015c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C86 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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