Malicious PDF — malware analysis report

Static analysis result for SHA-256 562e1a5088466691…

MALICIOUS

PDF

88.9 KB Created: 2021-02-27 00:21:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0868d913605d4304db82adbcdb89c6ce SHA-1: 24b762deb449d21558426d26d5afe60ce2c3a28d SHA-256: 562e1a5088466691a48208a73c8981c07e7cb9ec1550ae98ce9b3118a70a2981
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains and subdomains, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly 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 0.9997

Heuristics 6

  • 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.
  • 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://lozipotod.ru/123?utm_term=matplotlib+scatter+colorbar+label PDF link annotation
    • https://cdn.sqhk.co/dixejetafap/My8iaSV/new_york_stock_exchange_opening_time_south_africa.pdfIn PDF document text
    • https://guxitubekin.weebly.com/uploads/1/3/4/2/134267073/musesejazogejufug.pdfIn PDF document text
    • https://cdn.sqhk.co/pizililiv/bZFMvhd/baby_alive_accessories_and_clothes.pdfIn PDF document text
    • https://gororumemi.weebly.com/uploads/1/3/4/5/134517819/7022308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460963/normal_601e0657dc9c6.pdfIn PDF document text
    • http://lebepufu.mypressonline.com/79212984967.pdfIn PDF document text
    • https://rezalebivug.weebly.com/uploads/1/3/0/9/130969918/2362060.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426697/normal_5fecc89242308.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485718/normal_60082920117fd.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/jhi1hgn/19222809332.pdfIn PDF document text
    • https://mokapojigum.weebly.com/uploads/1/3/4/6/134690111/89608d.pdfIn PDF document text
    • https://nimukebobe.weebly.com/uploads/1/3/4/5/134527887/abb94518d195e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426073/normal_5fd09d7294e87.pdfIn PDF document text
    • https://gefobivuvevu.weebly.com/uploads/1/3/1/3/131380717/nilipiziz.pdfIn PDF document text
    • https://gilaxaled.weebly.com/uploads/1/3/1/4/131438091/sirenikinuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417309/normal_60322790d2d41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459794/normal_5ffa23b36ccb6.pdfIn PDF document text
    • https://puzerufatuv.weebly.com/uploads/1/3/1/1/131163838/9095505.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409110/normal_601d8e3e76ff3.pdfIn PDF document text
    • https://nagajaburelu.weebly.com/uploads/1/3/2/7/132740350/pegexanevuxozi_vafile_lopiza_lelonotaxoxuvo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://newemepakirid.myartsonline.com/asus_rt-n12_3_in_1_router_setup.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_off0001206d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1206D 5072 bytes
SHA-256: c552eb5da6e28a34e1b74ee7a17fad43334d4cd7bd9bdfa6d44525637f28c072
font_01_sfnt_off000131bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131BB 10740 bytes
SHA-256: 32356bc95f1b04c44d469169d22f303e78fe7d1db95a113c97f5771df3c4619e