Malicious PDF — malware analysis report

Static analysis result for SHA-256 032d7c8fcc4f1e7f…

MALICIOUS

PDF

87.1 KB Created: 2020-12-31 16:36:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b5b5e4f5c43c50557a5e169c10ed598f SHA-1: f921259b62676d5cdead5b836ef0b4fb68c0acd3 SHA-256: 032d7c8fcc4f1e7fdb721fffeb7e41db37fe8b725c99d5f608d32a062d70400c
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffmen.ru/strik?utm_term=twitter+followers+unfollowers+app In PDF document text
    • https://cdn.sqhk.co/minamojazi/6eifijr/starting_over_chris_stapleton_album.pdfIn PDF document text
    • https://cdn.sqhk.co/podadoxafa/hnidC1c/susamusojo.pdfIn PDF document text
    • https://tufuziboserivu.weebly.com/uploads/1/3/1/6/131636644/xifiduvadow.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/1429013.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/Kk4ginO/words_of_wonders_crossword_to_connect_vocabulary_download.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/xojajuv-mitegejitokuxig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c83089f1-9f68-4152-9996-e5f1e6655267/section_123_of_the_prescription_act.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed225b74-8f08-469b-a273-891b5a92d7ec/tabletop_simulator_scripting_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbc500d2-1dba-479f-9dc1-4543a5574adf/i_got_rhythm_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f20dafd3-0874-4ad4-a1ab-403dfd0041cc/13747571868.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4cedbdd-da6e-49fe-a83b-5d904e494dbc/mifapevowosa.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/deweraxeluxosed.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
    • 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAC 6744 bytes
SHA-256: 048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4
font_01_sfnt_off00011091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11091 4936 bytes
SHA-256: a90facac320b19d5f9d3a93ae1f3fae1911d098b0a8c2cb4503f62cf305a3deb
font_02_sfnt_off00012175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12175 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_03_sfnt_off00012a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A02 10668 bytes
SHA-256: 9cbd99572233c0ff30fd1c1598b67794c584a5c6e85dddb2a869649e01f68237

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