Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea05118d7d7333c…

MALICIOUS

PDF

49.6 KB Created: 2020-10-03 11:10:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 21e28ad3bb706eb636241f65215af3a0 SHA-1: f68716bcb9fb9c1d7f655a5522638a35a86d9ee7 SHA-256: bea05118d7d7333c1eb85ec92f7da71568d028de6fea070b99355d479f52b47f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with one prominent URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is related to sheet music, which is likely a lure. The presence of a malicious redirector indicates an attempt to lead the user to a harmful destination.

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://gettraff.ru/strik?keyword=asleep+the+smiths+sheet+music+pdf In PDF document text
    • http://files.andrewlcsw.com/uploads/1/3/1/1/131164152/6207442.pdfIn PDF document text
    • http://files.tahoetimbersledtours.com/uploads/1/3/2/6/132695493/noriwuxeze_didututubixoz_lanijokufabo_puxinoli.pdfIn PDF document text
    • http://jubasike.daydreamersjar.com/uploads/1/3/1/3/131379351/6406509.pdfIn PDF document text
    • http://files.devinmitchell32scholarshipfund.com/uploads/1/3/2/6/132681611/4157150.pdfIn PDF document text
    • http://files.ie-proaudio.com/uploads/1/3/1/4/131455337/1140044.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/1/0434/4584/6168/files/bimuxajupakevifodefasud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2154/9217/files/colonial_heights_library_va.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3035/9457/files/the_art_forger_discussion_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3872/3226/files/radedoragabam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1214/7360/files/75299071936.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4938/5126/files/86978543495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab08a5d6-ca41-45f9-a425-0264a5a0a378/47727961177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1729f0e-4eb3-4d3f-9221-5dd96b535ae9/povejexe.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6B 5080 bytes
SHA-256: ebe161446be27f52d5447e4dfb28351aa485fa3cbf6f69fda2f340c37da198ec
font_01_sfnt_off00007f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F99 10796 bytes
SHA-256: 934206de8cafdb33f24bd7bb8fd9426d5e4e99e6294d10f21fd20448fc405c7c
font_02_sfnt_off0000a4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4B5 16060 bytes
SHA-256: 4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d

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