Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2127c6cabcd2a5c…

MALICIOUS

PDF

84.3 KB Created: 2021-03-16 13:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6fc75ec13c667c69dd0f9454ebed5817 SHA-1: 23ac58e222b320a43e3e4a1773b83681884e7983 SHA-256: d2127c6cabcd2a5cb9a769ef1f92257ef0729619e6d5b7a8ff8d80520b0c6157
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://bologen.ru/strik?utm_term=what+happens+to+myne+in+shield+hero PDF link annotation
    • https://cdn.sqhk.co/meletadugox/hhetijh/70071388369.pdfIn PDF document text
    • http://pasendapp.online/kilifitavunomalanugilejex8wy2i.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/malazan_book_of_the_fallen_release_order.pdfIn PDF document text
    • https://gepidoduxaw.weebly.com/uploads/1/3/5/3/135324144/xotudonudafinoraxe.pdfIn PDF document text
    • https://zexaloguf.weebly.com/uploads/1/3/4/5/134576330/begatigod.pdfIn PDF document text
    • http://perevod24-card2card.site/cyberpunk_2077_reddit_config_fileszqfn.pdfIn PDF document text
    • http://drilltech.info/98082008503rfmhy.pdfIn PDF document text
    • https://cdn.sqhk.co/nigudovowa/jFGLDCl/vegan_dessert_recipes_chocolate_cupcake.pdfIn PDF document text
    • https://cdn.sqhk.co/gevagedubop/jfI9apD/viwunujavimapitutiwa.pdfIn PDF document text
    • http://hookup671.site/el_cantar_de_mio_cid_wikipedia_espaolatp45.pdfIn PDF document text
    • https://nupoxomet.weebly.com/uploads/1/3/4/3/134312810/854923b.pdfIn PDF document text
    • https://xivapumi.weebly.com/uploads/1/3/1/6/131606059/wobenoxilozegaw.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/HZVhdbv/drift_zone_2_pc_download.pdfIn PDF document text
    • http://secret-empire.ru/disneyland_map_2020_star_wars4evz8.pdfIn PDF document text
    • https://ralanuda.weebly.com/uploads/1/3/0/7/130775203/kobiwexi.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/mutubad.pdfIn PDF document text
    • http://com-signto5.xyz/59943071761yw9af.pdfIn PDF document text
    • http://povulofi.mywebcommunity.org/jotaxomo.pdfIn PDF document text
    • http://1fps.ru/368493268829xsyv.pdfIn PDF document text
    • https://cdn.sqhk.co/fepixuzutol/h41jahe/96380038180.pdfIn PDF document text
    • http://decideyouself.fun/fascismo_eterno22qdh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_03319db666a2437f8f1e62ff7c0ab816.pdf?index=trueIn PDF document text
    • https://13fad4bf-7224-44b3-802b-16842e97d241.filesusr.com/ugd/b14664_44e2e139fba0489386dad570c05a90fb.pdf?index=trueIn PDF document text
    • https://21c505bb-01ca-4817-a549-4ed1ebba5040.filesusr.com/ugd/7d7105_fa12d8cec9f54d6ab37384f4fdd48fed.pdf?index=trueIn PDF document text
    • https://128fc002-9ed4-4a8f-9a6b-83b43563a9ed.filesusr.com/ugd/6812d7_c1a4543815b34e4da316e6b0e0f18cf9.pdf?index=trueIn PDF document text
    • http://nibizuladode.onlinewebshop.net/dowedokojoparuroxig.pdfIn PDF document text
    • https://bc5ba30c-e427-49eb-abc4-9677f18f04c1.filesusr.com/ugd/bcd086_5d4514e1454a4ca89ac25d20aa69fb75.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_off00010dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFA 5312 bytes
SHA-256: 933bd9d7c778ab6b9b2d4d685d8f29d97ec62ff11e961ac06a009c287e80b289
font_01_sfnt_off00011fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEF 10412 bytes
SHA-256: b1c277005b342c00b2fc1d2fc5e96b592eea9e7a6312e151e742db3635ad55d5