Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b041967024c7a63…

MALICIOUS

PDF

80.0 KB Created: 2021-03-18 01:52:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5fa34331d5bb66b2f54fc696003bab75 SHA-1: 53720bb7ea4b4c7ceea1a40129bd3dd4d54d0aa0 SHA-256: 6b041967024c7a635666d2b92c55932642e5106a54453000d0187896a9140253
284 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a lure to copy/paste content into a command-line context, indicating an attempt to execute commands. It also hosts a large number of external links, many pointing to disposable hosting, suggesting a link farm or redirection infrastructure. The presence of a malicious redirector URL further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/aws?utm_term=how+do+i+send+a+saved+video+on+facebook+messenger In PDF document text
    • https://fusupolupiritox.weebly.com/uploads/1/3/4/3/134374508/738888.pdfIn PDF document text
    • https://nusazipupuw.weebly.com/uploads/1/3/4/0/134042511/781aec7905b6c.pdfIn PDF document text
    • https://cdn.sqhk.co/lovolipeg/2qW0gg0/fizilanuxozumijorad.pdfIn PDF document text
    • https://lopetumidola.weebly.com/uploads/1/3/3/9/133989387/7326209.pdfIn PDF document text
    • https://cdn.sqhk.co/tudosiki/zUjnij0/picapiedras_en_ingles_characters.pdfIn PDF document text
    • https://takewozijofu.weebly.com/uploads/1/3/2/6/132682119/wumonobijapije_jerereririzabit_mizezudatej_zetuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1dab3517-3db0-43ff-9fd6-b65b51f65b60.filesusr.com/ugd/565485_7971d0d4dc2c434aaf58fb54feef8da8.pdf?index=trueIn PDF document text
    • https://52aa71f3-9574-4e96-898b-bb16aa893b2c.filesusr.com/ugd/b13a71_2dd0c447ecae4138bc1b2a888aa071d3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kotenu/153729979.pdfIn PDF document text
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_22d37fac419b4b48b4d3b2a1649d5b1c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jiwisi/aquaman_and_superman_meme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/what_is_the_objectives_of_social_studies.pdfIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_6aacc9818692446084dccca2040faec2.pdf?index=trueIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_eebd3beb243a41da97810c9f88087b0b.pdf?index=trueIn PDF document text
    • https://b6086c54-8ef4-40f3-ba18-bbbb993b339e.filesusr.com/ugd/36e927_010f1c25b768417c923d820699d93b57.pdf?index=trueIn PDF document text
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_9f6258344c234f88bbda20eb817b74ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/bihar_board_ba_online_form_2019.pdfIn PDF document text
    • https://e0f910ba-f4aa-4d6b-87f6-24d78cda99ab.filesusr.com/ugd/cc15ef_3a8e71d4282f432c8e64a8611a35f420.pdf?index=trueIn PDF document text
    • https://0b21792c-a699-4cf4-8833-5910c6ad58af.filesusr.com/ugd/b0b521_1a1a9bd4c6154027be926af8eaba7921.pdf?index=trueIn PDF document text
    • https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_5868c52a4e844c18b0435a8802a0b0c1.pdf?index=trueIn PDF document text
    • https://4465b75e-e642-4f53-8c89-e22f0b9d4994.filesusr.com/ugd/ecd213_fab01eb02e1049588c350df5da42aed6.pdf?index=trueIn PDF document text
    • https://88bec3ce-9cdd-4818-a95b-bcf8ac49d1e7.filesusr.com/ugd/72df48_22a95a40f8e04423912fbc1961ff4f2e.pdf?index=trueIn PDF document text
    • https://ad0d0dbb-669b-46a9-85df-79487014a0f3.filesusr.com/ugd/00d95d_8cca96a7f8a045f396a2c3dec32cb91d.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF814 5628 bytes
SHA-256: c9aaba146721214d4f444831abd8eb18f12307e4235af79736910510e411cfe6
font_01_sfnt_off00010b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3F 10848 bytes
SHA-256: ded6afb526a62538b775f9e4e692b5bf36a5dcd045457531eedce0ca55f4abbc