Malicious PDF — malware analysis report

Static analysis result for SHA-256 07718d6ffd735fd8…

MALICIOUS

PDF

81.0 KB Created: 2020-11-14 04:06:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b7f111b016dbc4fae2076efdeb62a6c5 SHA-1: be62393e640f5818712efbbf63903d7a6807e5cc SHA-256: 07718d6ffd735fd89019c60e0c9b8bb158b7cff2d4188c1a118b8406195a9119
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for linking to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link farm suggests an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ggtraff.ru/aws?utm_term=kalkulus+gigi+adalah+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f884f9fc43a5.pdfIn PDF document text
    • https://ramokazadi.weebly.com/uploads/1/3/4/4/134470245/dumelut_ludowom_vutut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392207/normal_5f9efd5a27ae2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f86fb38596e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377414/normal_5f9e1a17072c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381347/normal_5f993e6cbfe2d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/0d10d646-5004-4d32-9a04-b7cb1a369bc6/words_that_start_with_nix.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/nfl_bettors_guide_week_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de4aa22d-7fbc-4d33-87c4-1c5202115608/word_of_the_day_toastmasters_size_and_font.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4939e452-aa93-49fd-b072-9a9fe5cdcc10/45085442394.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/the_saga_of_darren_shan_movie.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_off0000df30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF30 4708 bytes
SHA-256: 3921709f2e04af646b22642cd5e1fec7ea7be450eb943f7fb5ebf89c68cac036
font_01_sfnt_off0000ef31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF31 10584 bytes
SHA-256: 344555d43ea14d9c676433175ec2c5df9021e67ee85d549b1677b4589dfce5c2
font_02_sfnt_off00011361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11361 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
font_03_sfnt_off0001288f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1288F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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