Malicious PDF — malware analysis report

Static analysis result for SHA-256 913ffa95b6286f19…

MALICIOUS

PDF

73.3 KB Created: 2021-02-18 23:43:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d8a7b1af71d44b58464d4fa0bcad00b1 SHA-1: 3fd2a9beb1c3fb4e03d65392114e1c44103fd596 SHA-256: 913ffa95b6286f19fa415fca6d353c8c7f489ba49d79110aa9dd52e6d7380729
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The file contains a large number of external links, suggesting it is part of a link farm designed to distribute malicious content or phish users. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://yafferge.ru/123?utm_term=pillow+thoughts+3 In PDF document text
    • https://bemofoserobonuw.weebly.com/uploads/1/3/0/7/130739893/tonifev.pdfIn PDF document text
    • https://fezuxikazosulav.weebly.com/uploads/1/3/1/3/131398093/padusuvet-faxapi.pdfIn PDF document text
    • http://rokexulom.22web.org/plantronics_backbeat_pro_user_guide.pdfIn PDF document text
    • http://fasibada.22web.org/excel_vba_current_date_format.pdfIn PDF document text
    • https://rogetaguw.weebly.com/uploads/1/3/1/4/131407632/geloderekititi-desoxobezize-pesijunuraz.pdfIn PDF document text
    • https://dapalijika.weebly.com/uploads/1/3/0/7/130738969/giramifojufa_ligudodobazo_bigijotun_pufakidevewam.pdfIn PDF document text
    • https://roxuxafuz.weebly.com/uploads/1/3/0/8/130813852/jubolaxetafizamoxawa.pdfIn PDF document text
    • https://jelebemurufipo.weebly.com/uploads/1/3/4/4/134442628/861726.pdfIn PDF document text
    • https://logosomuzabi.weebly.com/uploads/1/3/0/9/130969340/vowobegewaxope-tebumaxudej-nefofaruzun.pdfIn PDF document text
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/3332072.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/potamotaz/online_wedding_card_design_template.pdfIn PDF document text
    • http://wubogijogazerew.epizy.com/dj_deadmau5_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/chief_keef_i_don_t_like_free.pdfIn PDF document text
    • http://lodofujur.rf.gd/android_9_pie_vs_8_oreo.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/codewarrior_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/45596655287.pdfIn PDF document text
    • http://baguzakanaso.epizy.com/dewenapipevukinam.pdfIn PDF document text
    • http://penixip.rf.gd/melamine_plywood_sheets_uk.pdfIn PDF document text
    • http://ribezewipuzez.epizy.com/29637273270.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_off0000c523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC523 2900 bytes
SHA-256: 40ce0bc9b113ef031639604f059b60aa9f1e41b097d60e75bfbf620cccc66306
font_01_sfnt_off0000cf67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF67 4900 bytes
SHA-256: 21ea7127bda0fc1cc610eef52f132aac50eb55574648dcf4bc8dc07a2c1e4574
font_02_sfnt_off0000e030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE030 9768 bytes
SHA-256: b62be85dbd831fa19fedf10d22983e9ea27aaa150e4bab44f8c046741f467187
font_03_sfnt_off000101f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F1 16144 bytes
SHA-256: d3fe2ff9da7dcd4b29304b2f4dcfdc585d14538596400971b71f84a9c66f92b3

Open this report in the interactive analyzer, or submit your own file for analysis.