Malicious PDF — malware analysis report

Static analysis result for SHA-256 274a877e79d96616…

MALICIOUS

PDF

41.8 KB Created: 2020-11-02 22:21:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 434317420fc6b1058b15def84bcf5919 SHA-1: 6042a6deecd4911240f3a9f5cdea4652f6eccfe2 SHA-256: 274a877e79d966161a6d5ef26e266d025a77f37a5d6b484899a15e2ea8692968
124 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, with at least one identified as a malicious redirector. The ML classifier strongly indicated maliciousness, and the document body contains text related to retrieving a SIM card, suggesting a potential phishing lure. The presence of multiple links hosted on disposable domains further supports a malicious intent to direct users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?keyword=tigo+como+recuperar+chip In PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/fifimu_sosigegizuz_guvagumunonax.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/sakuramexiperofi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368493/normal_5f8e5c0343683.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367950/normal_5fa01cea46f34.pdfIn PDF document text
    • https://buxivadoga.weebly.com/uploads/1/3/0/7/130740323/9497816.pdfIn PDF document text
    • https://zafitageleg.weebly.com/uploads/1/3/4/4/134489703/wobiladuwubepu.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://uploads.strikinglycdn.com/files/8006f447-cad2-4f93-9a18-127badf9c1ad/drum_beat_1954_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b61a91b-7317-4796-bdfc-e87ad74c506c/51557892204.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee566ae8-0d55-4d0f-b3eb-d4aa0e60dfd0/56992524580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6651/0500/files/80347531625.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bec1b3c9-bed9-4ea3-a8e2-1d575484be2d/industrial_sewing_machine_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43a7e528-1d37-4940-9c18-bf548f15febf/ponekifurizelarubazitad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ddbd558-71d7-440e-9407-3702788be595/43406584542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0082/2934/files/harriet_the_spy_book.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/fahrenheit_451_study_guide_answer.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_off00005777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5777 4784 bytes
SHA-256: ad1ab19162b206deda9b922e2bb8bd8d662fce584989e01dffe3a8261ade641b
font_01_sfnt_off000067b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B6 11192 bytes
SHA-256: b2709030d5ea70c308eeb9996bf1b82926cdd28820be07a4d7b094f77ac7dbda
font_02_sfnt_off00008c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C73 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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