Malicious PDF — malware analysis report

Static analysis result for SHA-256 8982dd7713132333…

MALICIOUS

PDF

75.5 KB Created: 2021-01-04 18:57:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c293d22eaeb6697d7b427804c4c5201 SHA-1: eed01507e08d5152f24214bf6130cba0dc552e71 SHA-256: 8982dd77131323331c22d5d526cf913d2de07c5441717e7ad549b248369d592f
156 Risk Score

Malware Insights

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

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers, indicating malicious intent. It contains a large number of external links, suggesting it functions as a link farm to direct users to potentially malicious websites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/aws?utm_term=mac+os+mojave+macbook+air+2012+performance
    • https://xinifusat.weebly.com/uploads/1/3/4/3/134321574/kuduwavemumobiz-ligij.pdf
    • https://nozigofomin.weebly.com/uploads/1/3/4/4/134481739/2817431.pdf
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/sesakaf.pdf
    • https://cdn.sqhk.co/revikokelobu/pdggjco/download_game_offroad_g_class_2018_mod_apk.pdf
    • https://fexiragija.weebly.com/uploads/1/3/1/4/131409693/6727592.pdf
    • https://cdn.sqhk.co/giruzegovu/P85jhjG/boat_wallpaper_hd_free.pdf
    • https://pitimonajavigo.weebly.com/uploads/1/3/1/3/131383860/jineverolud-pefekalib-vidusufela.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2d8a81c0-06bc-4817-b527-f3656a16d79e/reach_internet_best_friends.pdf
    • https://s3.amazonaws.com/wovisak/55264686383.pdf
    • https://s3.amazonaws.com/lukepepe/formation_auriculothrapie_lyon.pdf
    • https://s3.amazonaws.com/lodazojamuva/when_does_garlic_jr_saga_end.pdf
    • https://s3.amazonaws.com/zunaporam/free_lagu_cinta_luar_biasa_koplo.pdf
    • https://uploads.strikinglycdn.com/files/d9fded3e-38cb-4578-9776-a7bc993c71b7/relijuxumotut.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e92a.bin
ceeffe78c74e54412084a66dea7a5df0fde1726c996278b0efbad084cc9916a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE92A 5800 bytes
font_01_sfnt_off0000fcee.bin
881d79e4650a62f3be05c5ec7d3448221c29cf0db6da90947d49035e91d3759d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEE 10716 bytes