Malicious PDF — malware analysis report

Static analysis result for SHA-256 59fb4546f7e39c6e…

MALICIOUS

PDF

61.0 KB Created: 2020-08-12 05:36:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 160794918e112cab8118689897294207 SHA-1: 1725ea62d017949cd34555656bd545637c771edb SHA-256: 59fb4546f7e39c6e9082cea1db1b0b43b3f70fefe0a175c44ce90a7c66a9bdbc
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious domain, disguised as a document download. The document body itself contains the malicious URL and text suggesting a lure for 'mechanical engineering project ideas pdf download'. 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.com/pify?keyword=mechanical+engineering+project+ideas+pdf+download
    • http://gexiwuse.henryhomesconsulting.com/uploads/1/3/1/1/131164250/jalijawe.pdf
    • http://files.iwamonline.org/uploads/1/3/0/7/130776228/474cb74626f.pdf
    • http://vorur.eaststokesoutreachministry.org/uploads/1/3/1/3/131378960/d692d.pdf
    • http://miwon.washingtonsimmental.com/uploads/1/3/0/7/130776757/2582201.pdf
    • http://sojizipot.bastionaudio.co.uk/uploads/1/3/1/3/131384240/7158934.pdf
    • https://cdn.shopify.com/s/files/1/0439/2439/0056/files/56028011270.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48975286879.pdf
    • https://cdn.shopify.com/s/files/1/0432/9350/7739/files/buxutazej.pdf
    • https://cdn.shopify.com/s/files/1/0433/4429/8133/files/kewediruvozepivujesos.pdf
    • https://cdn.shopify.com/s/files/1/0430/3287/1074/files/rifavevugabejamubegubete.pdf
    • https://cdn.shopify.com/s/files/1/0435/3907/1130/files/bhopal_gas_tragedy_download.pdf
    • https://cdn.shopify.com/s/files/1/0455/4260/4965/files/rfid_based_attendance_system_using_8051_microcontroller.pdf
    • https://cdn.shopify.com/s/files/1/0431/3818/7413/files/25893079524.pdf
    • https://cdn.shopify.com/s/files/1/0433/2067/2409/files/bapabuvalutalarududalewe.pdf
    • https://cdn.shopify.com/s/files/1/0439/5125/9803/files/batching_plant_maintenance.pdf
    • https://cdn.shopify.com/s/files/1/0435/4772/1882/files/fijupujemamulopone.pdf
    • https://cdn.shopify.com/s/files/1/0437/5393/0901/files/chevy_350_rebuild_manual.pdf
    • https://cdn.shopify.com/s/files/1/0454/7497/1798/files/rational_functions_and_asymptotes.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_off0000a211.bin
ab4c7f5665c7be271188219b19ba29ea856dd866018dac4ece6b96672570e3d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA211 5592 bytes
font_01_sfnt_off0000b520.bin
1ff7dedf6d32ab65f823cfef608593436f4830c90c70f7163e7f6e504ced6e88		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB520 16168 bytes

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