Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc1f32b7b301d9b6…

MALICIOUS

PDF

37.1 KB Created: 2020-08-19 02:23:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c571cdf2d8b4f19763515d6fbf7dbf89 SHA-1: 7c7f6b996cda6ea777f2b6bf940a6e39b84dc68a SHA-256: fc1f32b7b301d9b68cf97c6edd3adc37087ea5d81aa8c1018b7178f74ab833dd
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to a lab report, likely intended to trick users into clicking the malicious link. No scripts were extracted, limiting the analysis of direct execution capabilities.

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.com/pify?keyword=experiment+3+calorimetry+lab+report
    • http://files.ebrschoolsedtech.org/uploads/1/3/0/7/130740589/segagupukuk.pdf
    • http://files.whizkidsprograms.com/uploads/1/3/2/7/132740836/segutivazoxomavadas.pdf
    • http://files.gvillegateshoa.com/uploads/1/3/1/8/131856491/lirajikubiguniva.pdf
    • https://cdn.shopify.com/s/files/1/0430/9997/9930/files/buffalo_breeds.pdf
    • https://cdn.shopify.com/s/files/1/0434/0950/6471/files/faxofixemavosebowadawiru.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/46183816923.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/54483769538.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/genetically_modified_crops_harmful_effects_on_health.pdf
    • https://cdn.shopify.com/s/files/1/0430/2798/8634/files/59737693213.pdf
    • https://cdn.shopify.com/s/files/1/0450/4079/5806/files/download_silabus_biologi_sma_kurikulum_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/jojelesazedilifef.pdf
    • https://cdn.shopify.com/s/files/1/0432/2017/2957/files/89353847494.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22271122494.pdf
    • https://cdn.shopify.com/s/files/1/0437/0818/6792/files/easy_alto_sax_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/5039/4019/files/occupational_safety_and_health_risk_assessment.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052ef.bin
816d57a428e2539da4c6433b583bdb1b6ebac80fffd04cf694abba900ab4bbd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x52EF 5332 bytes
font_01_sfnt_off00006504.bin
0e53926ae9c858b7a6da3db60e2c472fea71dbd0e46e23309c435d4a552094f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6504 10124 bytes