Malicious PDF — malware analysis report

Static analysis result for SHA-256 343d5ef61adc0bac…

MALICIOUS

PDF

87.7 KB Created: 2021-02-22 18:47:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d9b41373cb1c12dd042829715af86800 SHA-1: a9c668c0ca7e23297760464f86074560b2a1501b SHA-256: 343d5ef61adc0bac19728ee45770fc7f826607324098254c2f67a0c4044c06d4
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to PDF files hosted on link farm domains, indicating a phishing or SEO spam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and extensive URL usage are indicative of malicious activity, likely aiming to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/wix?keyword=adrian+dingle%2527s+chemistry+pages+answers+free PDF link annotation
    • https://cdn.sqhk.co/naxupowu/X8Yiaid/filowawewozitorogar.pdfIn PDF document text
    • https://bipinudaw.weebly.com/uploads/1/3/4/7/134718108/c56072eb9.pdfIn PDF document text
    • https://faliroralomi.weebly.com/uploads/1/3/0/8/130874474/runedifikasufe-tutezuzif.pdfIn PDF document text
    • https://tewijudejasivi.weebly.com/uploads/1/3/2/6/132682467/tejifij_bodelola_diseze.pdfIn PDF document text
    • https://cdn.sqhk.co/livefivepa/qPL6Djd/78919061784.pdfIn PDF document text
    • https://cdn.sqhk.co/kipafipigifi/AhaHWgj/pixikijosowafefir.pdfIn PDF document text
    • https://cdn.sqhk.co/fufitefan/jZ7jdqe/maize_maze_queens.pdfIn PDF document text
    • https://cdn.sqhk.co/kumotuxijufu/bdhflia/lyrica_dosage_for_sciatica.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/jicOjjc/xijevubo.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/P8gijij/princess_gloria_makeup_salon_download_apk.pdfIn PDF document text
    • https://lutitisuputusi.weebly.com/uploads/1/3/1/4/131437948/d8610e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402488/normal_5feaf7252de5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486981/normal_5ffc8e0baa657.pdfIn PDF document text
    • https://cdn.sqhk.co/jekenilegefe/xicigii/67601397866.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D2 5788 bytes
SHA-256: 6a40ee39c52692096d8319daf694c3666c3fea724d68a79a026665307f57592b
font_01_sfnt_off0001177e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177E 10472 bytes
SHA-256: 973e2cfc35aaaf76b270efaaa84d91e6b07fb197798a2a3596f8284c02acbd25
font_02_sfnt_off00013b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B9A 16348 bytes
SHA-256: b85e71bc95df81ad9e271af214a8669e065e60910a68649de66b15b8d795e4cd

Open this report in the interactive analyzer, or submit your own file for analysis.