Malicious PDF — malware analysis report

Static analysis result for SHA-256 f761f096d0e51b9c…

MALICIOUS

PDF

61.4 KB Created: 2020-12-20 19:51:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0103e5485f3b937f8ede541f9f0e83f6 SHA-1: 15686726032abdd5e14c52865f4e12afb6da14cf SHA-256: f761f096d0e51b9cfe9927e08a7c811aff651930c71ff76e9b4df03ddb476a50
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it functions as a link farm or phishing lure, directing users to potentially harmful websites. The document body, though partially corrupted, suggests a lure related to educational materials, specifically a 'comparison of adjectives worksheet grade 4'. No scripts were extracted, but the presence of numerous external links points towards a phishing or redirection attack.

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://traffnew.ru/aws?utm_term=comparison+of+adjectives+worksheet+grade+4 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453338/normal_5fa11d2ded5b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5f8a5b76a6f71.pdfIn PDF document text
    • https://wosufibataba.weebly.com/uploads/1/3/4/8/134866098/7747333.pdfIn PDF document text
    • https://dejuxowiku.weebly.com/uploads/1/3/0/7/130738850/dunisafupusig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450639/normal_5fa7faf16efc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383579/normal_5fbd6b3c5ca7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458163/normal_5fd3c8193b015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403680/normal_5fa6bbe42f249.pdfIn PDF document text
    • https://gamunodeda.weebly.com/uploads/1/3/4/7/134765824/85c9ca9189dc.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/mesotodimus/72637358049.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/illinois_amc_appraisal_list.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/consumer_reports_cars_2018_suv.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cf44e5c7695ca99b2c1d/t/5fc35629f81c9a2a0c0ccc58/1606637098360/mijapemali.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2c9392bbd74065812d409/t/5fc438dee6d49a06bb185df9/1606695137504/coatesville_krapf_bus_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/basic_life_support_exam_a_answers_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/quick_incisive_answer_crossword_clue.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_off0000b322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB322 5824 bytes
SHA-256: 4a1e1354908b7983f2b331dad4c891fb770c203058759b5fa0e8a1016bb3157b
font_01_sfnt_off0000c6eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6EB 9964 bytes
SHA-256: fc44ed5fa86c21baef9fd71af3497ed1bd9b56dd2ba54e0a122288f3a642b9d0

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