Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f402c31c165f586…

MALICIOUS

PDF

47.6 KB Created: 2020-10-28 22:41:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b5976a6b5e519b78762773d1b98a1411 SHA-1: 19274cc305bdc67cf13802d4314c7cc3ca27c025 SHA-256: 0f402c31c165f586f0e4672414278714a91491bda55d92d8d0f1a0a8145fb81b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector. This suggests the primary purpose is to lure users to malicious infrastructure, likely for phishing or to download further malware. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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 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.
  • 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://ggtraff.ru/strik?keyword=syarat+membuat+izin+domisili+perusahaan In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373992/normal_5f94fe539343a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_5f876617d91f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368244/normal_5f89f4da26e62.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://cdn.shopify.com/s/files/1/0437/3318/8762/files/free_johnson_outboard_motor_repair_manuals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9690/2294/files/handbook_chlor_alkali_technology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7787/0792/files/nike_studio_wrap_shoes_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/pirapevexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7881/9735/files/64163548598.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/depogeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4386/2693/files/human_becoming_theory_ppt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1261/5076/files/alimentacion_para_cirrosis_hepatica.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/agilent_34970a_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/rock_slope_stability_charles_a_kliche.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/wafezijiwafukipidezebetar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/6076/2050/files/74853517171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/2406/2908/files/23233274442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1911/4952/files/pusazuxodanupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3616/6312/files/remember_me_this_way_sabine_durrant.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5025/3984/files/limeladefezotimoj.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/29221357426.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/sixejifuxezi.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_off00006d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D91 5476 bytes
SHA-256: ff64c497fa9ba067bebb45442c1a47574b98d1670b506839ae8094dc2fec4730
font_01_sfnt_off00007ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF7 10080 bytes
SHA-256: 36fe9e34753fe08ab0c092797a170b06d675eaa17a7b9eccbe81cf67bf362b28
font_02_sfnt_off0000a27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA27B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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