Malicious PDF — malware analysis report

Static analysis result for SHA-256 abff473d9dcdfbba…

MALICIOUS

PDF

80.7 KB Created: 2020-12-26 07:43:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: bbc0a39b6386c4fcb06a3c6037a5109e SHA-1: d148595b5ca0ebcfcf9ef030cd5c5ee192966d81 SHA-256: abff473d9dcdfbba3f173077531d446f1c56f1fa57aaba76f278fd84f977a109
214 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, many of which are identified as malicious redirectors or part of a link farm. The document body, though heavily obfuscated, suggests a lure related to software downloads. The presence of multiple malicious links indicates an attempt to direct users to potentially harmful content or phishing sites, aligning with a spearphishing attachment attack pattern.

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 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=computer+launcher+pro+apk+mod In PDF document text
    • https://cdn.sqhk.co/sofaxuleruri/dijjahj/7926652911.pdfIn PDF document text
    • https://pafodezeba.weebly.com/uploads/1/3/4/5/134589846/wutuvajexepugiregex.pdfIn PDF document text
    • https://kizulivuvuruzor.weebly.com/uploads/1/3/4/8/134850547/dakivosez.pdfIn PDF document text
    • https://voxonevixes.weebly.com/uploads/1/3/4/3/134383310/bomixaxopel-muzexidawa-wefozedoba.pdfIn PDF document text
    • https://bovaromekefa.weebly.com/uploads/1/3/4/4/134403346/karipu_tamigejafinigax_wewikukezug.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/8KiNKjd/swahili-_english_translator_apk.pdfIn PDF document text
    • https://xukonixivuki.weebly.com/uploads/1/3/0/9/130969652/pevefubijigu.pdfIn PDF document text
    • https://cdn.sqhk.co/mepetiruzi/SpPHLLz/happy_fathers_day_quotes_from_son.pdfIn PDF document text
    • https://gegixigozazewit.weebly.com/uploads/1/3/4/8/134858275/dupakorazitapukobi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/zewixejona.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/jowafoxelofolefuwabi.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/94815068263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d2580fc-797c-46e5-984f-3c130fdcd5e5/nefigube.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/27977522616.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFF 3360 bytes
SHA-256: d0c3773567c796760a32fe9a543004bd1790742b1fba3d435d19d1e3d507cd9d
font_01_sfnt_off0000e9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D6 5104 bytes
SHA-256: d58b972425a4a7a5d2a9d9d1ea051287e87ea5e897bee105dde18d6e0e0d6e81
font_02_sfnt_off0000faf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF9 10668 bytes
SHA-256: 9ced1705fdf547a29320ef9c542ff0104aa786cd2a80b7b490b5bb2e948c3485
font_03_sfnt_off00011fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA8 16184 bytes
SHA-256: 312aca7386cb4e560f7b81d3dd8d16a21cb5ebb4955cc0045b2ee1c7720c1e31

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