Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e0493f1f35de51…

MALICIOUS

PDF

68.4 KB Created: 2020-12-22 15:28:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a2ae0de68169c3c5e1ea93ab0c7ce0fd SHA-1: e9a1f78fb3655c7fbd769663e107154b7d3ef232 SHA-256: 14e0493f1f35de51e5516b59ea27065a989f9cea6dc7e99b287255952dbc424b
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains a significant number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain keywords related to the malicious links, suggesting a phishing or scam attempt. No scripts were extracted, but the presence of numerous external links indicates an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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/strik?utm_term=art+therapy+certification+near+me In PDF document text
    • https://sasenepekevob.weebly.com/uploads/1/3/4/2/134266747/xarere-jemuxezoru-gerutikek-wojukad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459028/normal_5fc5dba2c6a5d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fcdfcfaecb86110b1356bd8/t/5fd641a7dca22152603d492a/1607877032180/wrong_turn_full_movie_tamil_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eeebee2-d242-4a1a-af87-5c7fac2a453d/60632370215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cac1d26-0303-42da-b3b5-eef3efad7516/maliwolaremowi.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/78838339149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87b86abf-a83d-4003-8dc1-4a5672107c94/13515942301.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/schematic_diagram_crt_tv_sharp_datasheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58a53d49dd1244753c377/t/5fc6da858f0796361568880a/1606867589539/oklahoma_city_university.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b41c9dc2-0a49-4f61-87b3-8d62a8dc0957/thick_sole_shoes_for_ladies.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/wofajuxofejago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fab401dc-a4d7-47d0-b022-0b38f842c429/in_salt_is_she_a_russian_spy.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/adventures_of_tintin_subtitles_english.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF56 5136 bytes
SHA-256: 417645b82dbf9e66140bceb259a2b45384f5941d19d3f056dabf60132d60b767
font_01_sfnt_off0000e0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B6 10560 bytes
SHA-256: 774ae3efc244b705afa4e3bab319f7dcfd6218d5b6d310200f5df73cc9a223ae

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