Malicious PDF — malware analysis report

Static analysis result for SHA-256 a84302a1b01a03e8…

MALICIOUS

PDF

46.2 KB Created: 2020-10-07 14:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cf6bbbddccce405f33f632f005e33ac9 SHA-1: 93bd9f69e823f41b418000dd983a8e9a1e6b40c7 SHA-256: a84302a1b01a03e8b388eaac3f0042b924793db75b178724c2bb90f4173ae3c9
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one identified as a malicious redirector. The document body, though partially obfuscated, includes the text 'Apprendre l' allemand pdf gratuit' and the malicious URL, suggesting a lure to a malicious site. The presence of a large number of external PDF links also indicates a link farm, likely for SEO manipulation or to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://gettraff.ru/strik?keyword=apprendre+l%2527+allemand+pdf+gratuit In PDF document text
    • http://tupijuxeb.yourfitnesschloeshea.com/uploads/1/3/1/4/131453048/9446747.pdfIn PDF document text
    • http://files.cluesescaperoom.com/uploads/1/3/1/4/131438260/7242017.pdfIn PDF document text
    • https://site-1040096.mozfiles.com/files/1040096/mekunit.pdfIn PDF document text
    • https://site-1043910.mozfiles.com/files/1043910/pazerironiwusu.pdfIn PDF document text
    • https://site-1042343.mozfiles.com/files/1042343/6906400059.pdfIn PDF document text
    • https://site-1039597.mozfiles.com/files/1039597/solivuforadebit.pdfIn PDF document text
    • https://site-1036876.mozfiles.com/files/1036876/75787292396.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4232/7713/files/epic_battle_simulator_2_mod_apk_revdl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1116/4320/files/apria_healthcare_complaints.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1080/4890/files/fiesta_st_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/2828/7127/files/ck-12_biology_workbook_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/0005/0079/files/61910367783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0118/3397/files/how_did_aristotle_classify_living_things.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_off000071b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B4 5204 bytes
SHA-256: c5add48000a81d4300fcfebbff83bbe7e5e2c2159f96ea5461085eabeb1b151e
font_01_sfnt_off00008362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8362 12276 bytes
SHA-256: 36706c14735b892c68701f49d4f1b4e97c782cdccf5b077e66c07113801b220e

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