Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe584714626d15b…

MALICIOUS

PDF

119.2 KB Created: 2021-03-17 00:17:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1a20ff667ab238b6697f25ac701b8573 SHA-1: d0d3b13531f88b4593c9a42a3e9c39c1d652ca48 SHA-256: 1fe584714626d15b40eececf8641ddab8dd071c616b6e5bb73e28cdd09947f37
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is heavily obfuscated and appears to be junk data, suggesting the primary function is to host malicious links rather than convey information.

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
  • 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 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://dafemum.ru/wix?keyword=rab+strata+guide+jacket In PDF document text
    • https://kagiwegelugamed.weebly.com/uploads/1/3/1/4/131453087/ea4c9a85.pdfIn PDF document text
    • https://pavonaxasove.weebly.com/uploads/1/3/5/3/135310158/0597bd.pdfIn PDF document text
    • http://astrohelp.space/moneygram_stock_price9iy1l.pdfIn PDF document text
    • http://nijalatol.mypressonline.com/23774378750.pdfIn PDF document text
    • https://ragulifogikub.weebly.com/uploads/1/3/3/9/133986704/3796289.pdfIn PDF document text
    • https://namevixezevir.weebly.com/uploads/1/3/0/9/130969021/bevavol.pdfIn PDF document text
    • http://sewototenovaro.iblogger.org/online_html_coding_platform.pdfIn PDF document text
    • http://jokebixa.22web.org/13373967748.pdfIn PDF document text
    • https://kelogukagikuval.weebly.com/uploads/1/3/0/7/130739039/e6d516a37.pdfIn PDF document text
    • http://xamojopilupivo.scienceontheweb.net/69639841048.pdfIn PDF document text
    • http://toportt.online/49456569716f949d.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/what_did_the_brown_v_board_of_education_decision_do_apexsup0w.pdfIn PDF document text
    • http://bejawutipage.mywebcommunity.org/el_libro_de_urantia_precio.pdfIn PDF document text
    • https://saxarewuvopa.weebly.com/uploads/1/3/4/8/134855039/04cda5.pdfIn PDF document text
    • http://betogav.22web.org/vozogoxupoxakavefutupe.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/92427174400.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pafapijeneradab.rf.gd/printable_yearly_calendar_2020.pdfIn PDF document text
    • http://buposubugoromot.rf.gd/57534343271.pdfIn PDF document text
    • http://jimotomalugeji.rf.gd/pupuwe.pdfIn PDF document text
    • http://bajejefi.epizy.com/can_i_use_a_universal_remote_for_car_dvd_player.pdfIn PDF document text
    • http://kadozebozedakof.rf.gd/fazivokitolo.pdfIn PDF document text
    • http://womusosixedel.epizy.com/litekiwomipajofemu.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_off0000f3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CC 52696 bytes
SHA-256: 68587b10793c184f789bf71e92a307f5fc09564bc5fab4d542747582f9e7bd34
font_01_sfnt_off00019223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19223 5360 bytes
SHA-256: 6f35f17928f95a9086fa15081d5b4ec6a23a4cf0e50e3787e4f98c928038822f
font_02_sfnt_off0001a47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A47A 12400 bytes
SHA-256: f8531fc8195b296f68a7050107143d1452dddb3c65507cd374061f87834eed2f

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