Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2cd77607dbbbf6d…

MALICIOUS

PDF

42.6 KB Created: 2020-11-06 02:18:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 3d1de86a016c9d921673873afbe541ec SHA-1: 7a14d800b03fae2efa787fe530d7e6b9d79ae77a SHA-256: a2cd77607dbbbf6ddc21f260c1df56e92b4931c99771b32254902e490d9c7091
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to known malicious redirectors or link farms. The document body, though partially corrupted, includes a URL that is also flagged as a malicious redirector. This suggests the primary purpose is to redirect users to potentially harmful websites, likely for phishing or malware distribution.

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://traffmen.ru/aws?keyword=where+is+carnival+clown+boards+in+fortnite In PDF document text
    • https://pirivelel.weebly.com/uploads/1/3/4/5/134505874/melibupibilipa_vetumaki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379839/normal_5fa09d2397e03.pdfIn PDF document text
    • https://nelibijejukeli.weebly.com/uploads/1/3/1/4/131437261/2493548.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/5238855.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370087/normal_5f87fdadc31d6.pdfIn PDF document text
    • https://munazuzane.weebly.com/uploads/1/3/4/3/134350045/809747.pdfIn PDF document text
    • https://nupejaxisolerez.weebly.com/uploads/1/3/4/3/134348845/diwebadilulov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7695/3263/files/99872834679.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/bienestar_psicologico_casullo.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/kakojupopegiluwunasovokoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47f90058-c5c5-4261-86b7-2aca919b7270/nelowamafukirefirezawusag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/5451/0492/files/38362505635.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/undetectable_jammer_for_fish_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bda5f709-b77c-4701-b522-7ba9c0600668/tuxuwubixerafeker.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/blue_dachshund_puppy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/696f28c0-fa7b-4f0d-b9e4-54b663a5004a/rock_space_wifi_range_extender_manual.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67AE 5412 bytes
SHA-256: bcf4c8879b1c100d8ec6393ae4d843779307dc62dbb868510b13a93556ecb48b
font_01_sfnt_off00007a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2E 10128 bytes
SHA-256: 0a98a067744fcd839c581e24999143708ff2ca6e1fc7749eace8b72c01a15e43

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