Malicious PDF — malware analysis report

Static analysis result for SHA-256 25bc0328a677a67a…

MALICIOUS

PDF

43.6 KB Created: 2020-11-02 08:27:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95a78f78fe7b8c0d3f272d332b19d6b6 SHA-1: d414848470e78951c951aa1d72b1b3e020ae65cd SHA-256: 25bc0328a677a67a90452e4f0745cb433fc64319b543b0d2f90f4834faf7b9b7
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one specifically pointing to a known malicious redirector. This redirector is associated with a lure for 'shop empire 2 apk', suggesting a phishing or malware distribution attempt. The presence of numerous external links, many pointing to benign content, is likely a tactic to disguise the malicious link within a larger, seemingly legitimate collection.

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/123?keyword=shop+empire+2+apk
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cbf9970a-5010-440f-93ac-5834ac229491/89615531892.pdf
    • https://uploads.strikinglycdn.com/files/a4e8236c-3f40-4dfd-8a3e-21fd0729e870/the_originals_season_1_episode_17.pdf
    • https://uploads.strikinglycdn.com/files/1e6305d2-8888-42f1-abf0-b1f9e830f926/anyon_hidden_curriculum.pdf
    • https://uploads.strikinglycdn.com/files/a22f9a7b-a29e-4cfa-8ec6-01720f6b4131/fuweperere.pdf
    • https://uploads.strikinglycdn.com/files/79fbec54-29ef-4ffe-898e-4880ab1f833c/dabotemesogefonu.pdf
    • https://cdn.shopify.com/s/files/1/0268/9063/3415/files/tutor2u_investment_appraisal_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/17d335b3-012c-44c0-a512-e319634fdd99/19167978572.pdf
    • https://uploads.strikinglycdn.com/files/bde91972-9b87-4a8d-8904-6dc64ada158f/velanomotajiwapo.pdf
    • https://uploads.strikinglycdn.com/files/af355be9-b834-4f8b-b595-ee796816986d/sevuraba.pdf
    • https://uploads.strikinglycdn.com/files/1a034b1f-e954-4cd2-928c-37326810f163/pome_sur_l_cole.pdf
    • https://uploads.strikinglycdn.com/files/ef805846-434a-475c-b2c7-c4274d7f8900/cinderella_and_four_knights_ep_14_en.pdf
    • https://uploads.strikinglycdn.com/files/a4d90cbd-a339-428c-b254-195a8e1f6118/72658175200.pdf
    • https://uploads.strikinglycdn.com/files/df25c57e-9488-493c-a276-8d4f36a8bbb1/wiwodulewotujoxetobevir.pdf
    • https://uploads.strikinglycdn.com/files/89f7d3c7-c0d3-4200-90fc-87cca095331f/27347201894.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052f7.bin
042be52e9d09040d04a8b82fa95081a16577e945d9c6f06b6d3bf0826f28978e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52F7 5148 bytes
font_01_sfnt_off0000644a.bin
256b1d38f6c10565de12815a782c5efe43e239c0ad76bfe50361da78e8c157f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x644A 12052 bytes
font_02_sfnt_off00008b84.bin
02c7f89a76d3a9b8e95b26edbb62387e2d0c7f52aa3b909e79dd11d7f0df9289		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B84 16316 bytes

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