Malicious PDF — malware analysis report

Static analysis result for SHA-256 912f1b94920c6775…

MALICIOUS

PDF

53.8 KB Created: 2020-08-08 16:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3d7f3006a860d8e9236e816e4bda28c SHA-1: a2993f696d2e03eb91374ac9bc17f7f053d3122b SHA-256: 912f1b94920c67755938bf870de38047c5b8e58c12c49c5c3aadb50ff76a5199
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting a lure related to 'capecitabine mechanism of action pdf', likely to entice users to click the malicious link. The PDF_SEO_LINK_FARM heuristic further suggests this PDF is part of a larger scheme to distribute malicious content.

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.ru/pify?keyword=capecitabine+mechanism+of+action+pdf
    • http://files.spencerhdesign.com/uploads/1/3/1/1/131164033/lekebum.pdf
    • http://files.darvanadoulaservices.com/uploads/1/3/0/7/130775959/godujabu-gowesor-rizofokezopa.pdf
    • http://files.headphonerepairhouse.com/uploads/1/3/1/1/131163747/6842481.pdf
    • http://jukogeso.charliehempseed.com/uploads/1/3/1/6/131606758/zalem_darekijodaris_kitolasegiximo_vupajikowexej.pdf
    • http://files.doublempartners.com/uploads/1/3/0/8/130874162/xexojelotejizelavodo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0862/1719/files/wiguzana.pdf
    • https://cdn.shopify.com/s/files/1/0430/7389/6602/files/jixirenimekeluvudavoti.pdf
    • https://cdn.shopify.com/s/files/1/0433/9076/3175/files/46178685181.pdf
    • https://cdn.shopify.com/s/files/1/0436/1430/6467/files/the_masonic_bible.pdf
    • https://cdn.shopify.com/s/files/1/0431/8593/0402/files/86040928043.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6938/files/kaputaxagomunapup.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/manualidades_con_material_reciclado_paso_a_paso.pdf
    • https://cdn.shopify.com/s/files/1/0431/6577/8076/files/dunisijowonupaxori.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/aabb_technical_manual_18th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/5709/4559/files/the_shrek_script.pdf
    • https://cdn.shopify.com/s/files/1/0433/5324/3806/files/rariveduf.pdf
    • https://cdn.shopify.com/s/files/1/0431/2154/1277/files/physics_cutnell_10th_edition.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000773b.bin
78952fedd30b5d9b51aefa5d0931580278eb121076013d3abb2619ea86181636		 pdf-font-stream PDF embedded font (sfnt) at offset 0x773B 5312 bytes
font_01_sfnt_off0000891e.bin
8d68536628b3291c2c413cdf4987a80c0f192cc6d756f1042aeafbf1fd2dc5e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x891E 12292 bytes
font_02_sfnt_off0000b2a6.bin
298a059a47d04402a822539650cb20f422186273fa20e8de9e2ef64d066f24e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2A6 16160 bytes

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