Malicious PDF — malware analysis report

Static analysis result for SHA-256 d330ed9edde2a9b0…

MALICIOUS

PDF

108.7 KB Created: 2021-03-30 01:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 51e9e35368bc7b7ca9fc53a33df3b042 SHA-1: 7618ed8259b0320d0e109ce775bb7f6360899e28 SHA-256: d330ed9edde2a9b0516c1758b42f2ed3968f96f6040c817059b72bc2a3b4b101
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent link leading to a domain associated with phishing and SEO link farming. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious sites, potentially for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://maypoin.ru/award?keyword=ashton+manual+pdf+download PDF link annotation
    • https://mimevomakiket.weebly.com/uploads/1/3/4/6/134693464/1145283.pdfIn PDF document text
    • https://cdn.sqhk.co/nusuguponu/jajhljf/69169721884.pdfIn PDF document text
    • https://cdn.sqhk.co/kixikeli/jNMFhhd/december_2017_international_sat_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/mowefakura/ji4haJU/vigeviwukabeputuj.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/dN7idjj/74341131412.pdfIn PDF document text
    • https://dawosovakix.weebly.com/uploads/1/3/6/0/136097295/duxivexusuvofo-wofinumakis-pagogozixoxox.pdfIn PDF document text
    • https://nawolokiwepona.weebly.com/uploads/1/3/2/8/132814855/rigapodopulav.pdfIn PDF document text
    • http://wamawogep.iblogger.org/avivahit_praman_patra_format.pdfIn PDF document text
    • https://wibujiwegawej.weebly.com/uploads/1/3/4/8/134899761/sunegefa-kavopiwatore-xuzevenuba.pdfIn PDF document text
    • https://kezugefoluvero.weebly.com/uploads/1/3/1/8/131856244/xepulaxuf_kafopimufuxup.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/tobaziw/googly_audio_songs_kannada.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/suverun.pdfIn PDF document text
    • https://29bb9f0a-cb36-4278-8b1c-05d86a2267e4.filesusr.com/ugd/25e746_8f5ea7c052bf4ea597887dd9b54d6169.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/10745742458.pdfIn PDF document text
    • http://werodusemojugo.epizy.com/juxugabedasebuxem.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/the_selection_elite_summary.pdfIn PDF document text
    • https://8f0c9b82-9570-4081-bbb7-5e23a534ea09.filesusr.com/ugd/7008f3_ed9a2a97b061453f9fefa701adb4b703.pdf?index=trueIn PDF document text
    • https://df4002df-ed14-466c-b758-10ced248c840.filesusr.com/ugd/3b03e6_b3ad909185904823822daf2b37084c81.pdf?index=trueIn PDF document text
    • https://4f65703b-d4c0-4c9c-9e30-73c8cc83ec5d.filesusr.com/ugd/54fa57_8f5d5ec2a2684849a4f7e4236fff2932.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000137aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137AA 4984 bytes
SHA-256: c8e66e5f156bcf3e60386a3ffd3375615685787282f9b16d6f7d42788e56ce00
font_01_sfnt_off00014875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14875 18272 bytes
SHA-256: 6b88bfd9138595c707ea0d29667b1db19a8c29e22956f562b85334e92a1e2793
font_02_sfnt_off00017f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F91 16232 bytes
SHA-256: f9e711f2bfa3a8b6ac2e655ede59d1153c5b1845b6ef0bf43f0f7514c3c7ee70
font_03_sfnt_off000194ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x194EE 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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