Malicious PDF — malware analysis report

Static analysis result for SHA-256 adfdafb222148ba7…

MALICIOUS

PDF

92.1 KB Created: 2021-03-17 09:25:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d256f89fe04f78e218c53f582f111db2 SHA-1: 247438f2cafa295d8c3b959b95adb88f4220ee4f SHA-256: adfdafb222148ba7946f7b9db3b7ffb142d7642b5eee70ccc8aa1e9a6d82c5de
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of embedded external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of a URL with a 'utm_term' parameter further supports the idea of a targeted lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/strik?utm_term=i+am+not+what+you+think+i+am+meaning+in+hindi PDF link annotation
    • https://zatofurepodato.weebly.com/uploads/1/3/1/4/131482853/riritepe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464870/normal_5ff53e61a2707.pdfIn PDF document text
    • https://delosixopefo.weebly.com/uploads/1/3/4/3/134344482/fusaxu.pdfIn PDF document text
    • http://zujewubowufonug.scienceontheweb.net/35664284044.pdfIn PDF document text
    • https://vajugape.weebly.com/uploads/1/3/4/7/134767319/671d08023.pdfIn PDF document text
    • http://giwitijudaleka.mygamesonline.org/bhagwat_geeta_in_hindi_chapter_11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494430/normal_5fceef0008b0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451744/normal_603c319f0f72a.pdfIn PDF document text
    • http://wovoradomumakil.medianewsonline.com/pupivaredipigusizejejima.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475391/normal_604cf140add0d.pdfIn PDF document text
    • https://digagewopaloz.weebly.com/uploads/1/3/4/6/134634746/zimefetavas-fezar-moxukef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_0b79e2db19b049f7a8abec0b08036bea.pdf?index=trueIn PDF document text
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_0a77b306ee9d4cdeb061c134654bbfb1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8277cec9-f307-4176-9c89-b51b1149b76c/wevosimelibeledom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ee3e414-e324-4919-a954-14d96688981d/dias_feriados_por_ley_en_mexico_2020.pdfIn PDF document text
    • http://kagijido.myartsonline.com/memolebuj.pdfIn PDF document text
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_6706d70ea98542688b14ea3f261aaa36.pdf?index=trueIn PDF document text
    • https://fbaba6ab-37cf-477f-82bd-e10a416eccda.filesusr.com/ugd/3c8574_90850589ca8f48af9c14026bd4170063.pdf?index=trueIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_c0155dcedb524d46a5a8cf564c68a007.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b33de4ed-4e5f-436a-8263-1e758ed6e4ac/70903925189.pdfIn PDF document text
    • https://238a82c5-85a8-4641-a991-2f0f5270ddc4.filesusr.com/ugd/63f22d_6f98146af65649deacc1420ded62d05c.pdf?index=trueIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_4dc7c4b8dd0446739ef8a9883ffcd18d.pdf?index=trueIn PDF document text
    • https://c63359c4-faa5-40af-ad11-254ddd3d100c.filesusr.com/ugd/838c33_6b6ef2884622449cb22080dbd3a1fdc1.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10650 5128 bytes
SHA-256: 3c35437317cabbac97c500def09151075c3b4811bc2b11cffbcab83497be1782
font_01_sfnt_off000117b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B5 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off00012318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12318 10492 bytes
SHA-256: 7d601cd6bc31cbfd198424db12675b53b122b5f891304bde7d19caef4de55fde
font_03_sfnt_off00014757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14757 8156 bytes
SHA-256: 52a0861f794dceb22e20ae07985769ca1b15f964d64c511959257d963d8e2232

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