Malicious PDF — malware analysis report

Static analysis result for SHA-256 3099db3b25045542…

MALICIOUS

PDF

56.4 KB Created: 2020-10-16 14:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 21a6ccbdfcee0c72c2df8dd2adb44745 SHA-1: 52f20da71d0f00c3d94a1b55a600abb055bf9726 SHA-256: 3099db3b25045542da90adcfe3829c7696cd2b9b62f0dcea79eac90712e4d728
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to attract traffic or distribute further malware.

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://cctraff.ru/pify?keyword=rch+guidelines+cows+milk+allergy In PDF document text
    • https://zeteparikimifol.weebly.com/uploads/1/3/1/6/131637109/rigugomar_wifuxivep_bupukewufi.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/ginepoloduxeronew.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/5648329.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/winepogor.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/bosilo_ginasesif.pdfIn PDF document text
    • https://tabuxeniki.weebly.com/uploads/1/3/2/6/132682737/5587608.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/76bde.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8709547.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/38b56.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zuvefusu_tewojawowebav.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3731638.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/1/0493/4254/6079/files/mogugumasudikebifasiro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6160/6550/files/texikawepomuxavedowetazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/6651/1526/files/dwg_viewer_android_app_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5baeb320-d8c6-4a1d-93d0-e46a84cfac13/61198123903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7129136-84f0-44cb-9997-4db454b0e411/sivuzeroxenozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b3d7ca3-7e39-476c-85b5-95dc9d7b2600/tisojov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a8af3d7-aee1-403e-b18d-638a7a1714fc/32735962353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3033/2060/files/heat_n_glo_fireplace_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/2361/9990/files/95216813314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8402/9351/files/only_love_today_rachel_macy_stafford.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6733/3525/files/naduradorawosudeta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6502/3898/files/malisitopenulevabope.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_off0000900b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x900B 5420 bytes
SHA-256: 98e434f3416b5bcf7b5f3966af08b6a8b8e08494ac1e6ba7b7302f2a683bd9c5
font_01_sfnt_off0000a252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA252 10304 bytes
SHA-256: 06fb8f0e3e111db21e9c67f1800bdd1e1e3a82ba4318978710faec9c847151c4
font_02_sfnt_off0000c56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC56C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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