Malicious PDF — malware analysis report

Static analysis result for SHA-256 05fccec8239fb5be…

MALICIOUS

PDF

41.2 KB Created: 2020-08-17 09:38:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16e4a800e51b712702c2e48a82595d0f SHA-1: ff09aa6d722959fa2fc845fc186765bad38fceca SHA-256: 05fccec8239fb5be87d47d04d4e5659fb20fda96eaedeae63412826b35f8b545
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, contains text related to updating Huawei phones, suggesting a lure to trick users into clicking malicious links. The ML classifier also strongly indicated maliciousness.

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://ttraff.cc/pify?keyword=aggiornare+huawei+p8+lite+android+7
    • http://files.kelseysq.com/uploads/1/3/0/7/130776599/pawuj-vigisanugeguwe-zigosogome-bunusujav.pdf
    • http://revaga.theoaksmith.com/uploads/1/3/1/0/131070722/wapozow_pudawibatafof_wikusajemeli_ziruxakututax.pdf
    • http://files.luluanthistle.com/uploads/1/3/1/0/131071209/lunarusodunow-wavepikiw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/22122515418.pdf
    • https://cdn.shopify.com/s/files/1/0433/2430/9659/files/discourse_analysis_of_newspaper_articles.pdf
    • https://cdn.shopify.com/s/files/1/0429/4151/3894/files/bail_application_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/13378946016.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sesolofulazige.pdf
    • https://cdn.shopify.com/s/files/1/0434/1088/2727/files/xekujabetewufu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9571/0113/files/64368015909.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/tokajenebinogafezudesepo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2175/3758/files/lofabojejusavagalamuwup.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062ab.bin
ccaaecd1dc64e94e454cebd4ba5220abd6d5a990d823f5a861f5b18ece354f46
pdf-font-stream PDF embedded font (sfnt) at offset 0x62AB 5400 bytes
font_01_sfnt_off00007514.bin
7ce6c29f94d8f6d9cb36dce5475649c06cad22ee0ce4d211efbb974846f160a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7514 10344 bytes