Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccd895216f0de93b…

MALICIOUS

PDF

80.8 KB Created: 2021-03-30 22:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e222fd75472d4703054d0c596367f810 SHA-1: 50a98afd73c8972c352a7d7c4bbccbe90b86beb2 SHA-256: ccd895216f0de93bee2f9e64371f575d39404630607e49c40955ef9a503e8150
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 5

  • 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.
  • 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://leonvi.ru/123?utm_term=free++west+asia+map PDF link annotation
    • https://cdn.sqhk.co/rifojimuna/fjhcufS/kusugevurid.pdfIn PDF document text
    • http://zesamoa.online/fisher_paykel_dishwasher_error_codesjj8vx.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/jsPhd0F/17439148387.pdfIn PDF document text
    • https://cdn.sqhk.co/tetolonul/c2hdYgj/69595259239.pdfIn PDF document text
    • http://servicesforsupport.com/17525794652jvi00.pdfIn PDF document text
    • https://bilurowunolip.weebly.com/uploads/1/3/4/3/134316979/5961585.pdfIn PDF document text
    • http://activa-fb.com/bepuvudisip6swwm.pdfIn PDF document text
    • https://ronenajawewaxiw.weebly.com/uploads/1/3/4/5/134594127/tasimuzokinej_vovefezagajo_febenekufuzoxit_munibegalin.pdfIn PDF document text
    • https://cdn.sqhk.co/vusunuvaka/jIhirkl/56422404664.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/5ejaLji/dino_run_chrome_web_store.pdfIn PDF document text
    • http://xtrading.buzz/97254343676i3ygp.pdfIn PDF document text
    • https://zinivopupo.weebly.com/uploads/1/3/4/3/134386920/3399192.pdfIn PDF document text
    • https://volifinidolil.weebly.com/uploads/1/3/0/8/130873876/2050659.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/BgfBgji/jidetur.pdfIn PDF document text
    • https://cdn.sqhk.co/gozafavapawu/cPYghji/how_to_loot_bodies_in_dayz_ps4.pdfIn PDF document text
    • https://rozozejowetape.weebly.com/uploads/1/3/4/5/134510424/zosaf.pdfIn PDF document text
    • https://cdn.sqhk.co/tipadasa/g9idJbm/jipurafilibagiji.pdfIn PDF document text
    • https://vebexedupatad.weebly.com/uploads/1/3/2/7/132740253/7800617.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/utnhjgd/online_maths_games_2d_shapes.pdfIn PDF document text
    • https://cdn.sqhk.co/nubavojek/ad8ci8X/trackitonline_dtdc_courier.pdfIn PDF document text
    • https://mavulirapiba.weebly.com/uploads/1/3/4/7/134741644/libumaxavikelurox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zazelujeju/jefibejomobowufufoz.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/chamberlain_liftmaster_professional_1_2_hp_program_keypad.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/58946194366.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/calculator_scientific_for_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/dexej.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_off0000f062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF062 4552 bytes
SHA-256: 42ca62de15483ed39461c539c8f01b020f58a7ecf119fe71600c2f32875446ca
font_01_sfnt_off0000ffe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE0 11128 bytes
SHA-256: 45458a81be27349b503ff452742389e118cb63a2c8192da358976c4823f4e2a8
font_02_sfnt_off000125f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F2 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378