Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e4753f2b41311d…

MALICIOUS

PDF

76.0 KB Created: 2021-02-08 18:49:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 11cb770f21aeac6031b505b9b32027b7 SHA-1: 5eb2addd5256c0388cc6ff509c8cfdfe44b434ea SHA-256: 96e4753f2b41311db586329eb191703d1290c1389fbeec9e506f07f4b12bd9c0
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to disposable hosting and are designed to appear as search results or guides, indicating a link farm for SEO manipulation. The presence of a known malicious redirector URL and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/wb?keyword=cheat%20naruto%20shippuden%20senki%20mod%20apk In PDF document text
    • http://websecurer.tech/ffxi_pup_guide31qyj.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/xP07Hic/diloduxuxijibofo.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/GhjEoja/cheap_flights_to_las_vegas.pdfIn PDF document text
    • https://fekoguto.weebly.com/uploads/1/3/4/4/134491689/9342884.pdfIn PDF document text
    • http://afracheat3.xyz/history_of_west_african_slave_tradezhh13.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/jfjb0Os/average_tip_percentage_for_pizza_delivery.pdfIn PDF document text
    • http://vijuziruzunubiz.iblogger.org/31185721524.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvotalek/ii5ifwH/rulinekitumiwudiwo.pdfIn PDF document text
    • https://vevumugenewasu.weebly.com/uploads/1/3/0/7/130776279/vorenes.pdfIn PDF document text
    • https://zanixikowupu.weebly.com/uploads/1/3/1/4/131437740/puzolixe.pdfIn PDF document text
    • https://vefibaxo.weebly.com/uploads/1/3/1/3/131379874/2bb8f431faa.pdfIn PDF document text
    • http://zinuginevero.22web.org/3111046445.pdfIn PDF document text
    • https://cdn.sqhk.co/fudikuzi/6wY5vuT/top_40_radio_station_list.pdfIn PDF document text
    • https://cdn.sqhk.co/datagemop/gjNTjd9/rocket_sky_unlimited_game.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/jc3jhgj/nextbike_gmbh_leipzig.pdfIn PDF document text
    • https://cdn.sqhk.co/jagojixego/ijQxCtr/95054384872.pdfIn PDF document text
    • https://cdn.sqhk.co/vavusiwi/dhgwbwG/3d_tennis_app.pdfIn PDF document text
    • https://difanewoxapazu.weebly.com/uploads/1/3/5/3/135321324/b3feb2ef0102.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lojurixerura.epizy.com/anniyan_tamil_movie_with_english_subtitles.pdfIn PDF document text
    • http://refusenub.rf.gd/22192705147.pdfIn PDF document text
    • http://sujidise.epizy.com/38915289636.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD719 5808 bytes
SHA-256: 53c3ce0cd3373a314fd046236eb0b334beea82ec3bc72c4d2cfcf5ababb49231
font_01_sfnt_off0000eb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB55 5136 bytes
SHA-256: 6f58423f7f1dbed235ef8da92429687df7c357228e4187a1a270ad0d878495d4
font_02_sfnt_off0000fc98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC98 11008 bytes
SHA-256: e7058a3d21b93cca793c38ff225094cf555d28316c09cb9fb0392bd0545645d0