Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f9fb8c1aa662b0f…

MALICIOUS

PDF

81.2 KB Created: 2021-03-18 05:46:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0997061c6c1b0db942e7fb19716d4859 SHA-1: 559aa1e6dfb2340d652c86eb622dd8c013ff3614 SHA-256: 9f9fb8c1aa662b0fbbce8f668ee5a7cfcc883a8c165ec3a7e2aba10d2da63a7f
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/wix?keyword=polaris+snowmobile+repair+manual PDF link annotation
    • https://cdn.sqhk.co/lebudawojafi/aibTQjg/15510652897.pdfIn PDF document text
    • http://mopexaxurip.getenjoyment.net/99503351644.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404502/normal_5fdcffd61bdc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450042/normal_604adb9f8c8f3.pdfIn PDF document text
    • https://toxutumopomepe.weebly.com/uploads/1/3/5/3/135327812/2534335.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/joseph_prince_church_dallas_texas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368972/normal_5ff98e6666677.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/sifgwje/guided_meditation_mindfulness_movement.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/ghmgdhe/beyond_meat_nutritional_information.pdfIn PDF document text
    • http://ruwazumusef.scienceontheweb.net/1931515797.pdfIn PDF document text
    • https://toguxobuse.weebly.com/uploads/1/3/4/9/134902292/mixuxip_tatamebibat_gipoxoxubasad_denokekegili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448339/normal_600c7024df4b1.pdfIn PDF document text
    • https://cdn.sqhk.co/zosiwikiw/gfjcgcD/color_by_number_anime_manga.pdfIn PDF document text
    • https://kafasomawupi.weebly.com/uploads/1/3/0/7/130775431/2cda4f.pdfIn PDF document text
    • https://cdn.sqhk.co/wigatozaduw/jtjjihz/cheetah_print_runner_rug.pdfIn PDF document text
    • http://jopagozopive.medianewsonline.com/what_are_the_8_themes_of_world_history.pdfIn PDF document text
    • https://zogazakuf.weebly.com/uploads/1/3/1/6/131636678/bisexenis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f11c4bf2-12a6-49f8-9590-07a94b689168.filesusr.com/ugd/11276f_5f09d0e27e4b45e39ed16e7928e3c8c2.pdf?index=trueIn PDF document text
    • https://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_d06d769288eb47968ce953b033730978.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9057faa3-444f-4598-a330-eb75d7e88ddf/toreteguxisivisez.pdfIn PDF document text
    • https://9cfe8934-cc69-4f76-a0d0-2e9849ea4530.filesusr.com/ugd/fd9558_53c78229be1e4f59a9aa244520ff3589.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe608344-5fdb-41d1-acb5-d3a00fec076c/48406030791.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72570c17-d138-48b7-8a56-c3544e1c271e/how_do_i_fix_error_code_e01_on_a_lazy_spa.pdfIn PDF document text
    • https://de99c131-68bf-4271-bcef-cda292486844.filesusr.com/ugd/f5892c_e470a57617ac44fbac4b32164e59fc27.pdf?index=trueIn PDF document text
    • http://gixopiv.onlinewebshop.net/sword_art_online_1_aincrad_anime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/336ba7f0-9471-4303-b880-ebd45dc6ca62/bissell_powerforce_helix_rewind_belt.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000feaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAA 5200 bytes
SHA-256: 0cbad4178be511ce58efde16f2edcfe5962ce09006c76bdff91a6f96d5908057
font_01_sfnt_off0001104f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104F 11264 bytes
SHA-256: 34c3f5fe4e99d2162be32b4e0a30862a0ca3be834cb0eb5080468abefcedc508