Malicious PDF — malware analysis report

Static analysis result for SHA-256 19ac967fea5dbef6…

MALICIOUS

PDF

41.5 KB Created: 2020-08-12 06:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb8f3ad00ce43146d3ec1b8704a605da SHA-1: 67022bd248e8c23aa405c6902ae822a7a3f88844 SHA-256: 19ac967fea5dbef6dcd233e1b4ab73cef3f00677b16569f9f5d133e38a8b2c30
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to potentially malicious redirector infrastructure. The primary malicious URL identified is a redirector designed to send users to further malicious content. The document body, though heavily obfuscated, contains references to a "Netbeans ide 8.2 tutorial pdf" and a URL that aligns with the malicious redirector, suggesting a lure to disguise the malicious intent. No scripts were extracted from this sample.

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=netbeans+ide+8.+2+tutorial+pdf
    • http://liwop.carmenjabaloyes.com/uploads/1/3/1/8/131855997/5832216.pdf
    • http://files.martelladesign.com/uploads/1/3/0/9/130968920/kilabopo-kejole-disexize.pdf
    • http://files.againstthegrainyyc.com/uploads/1/3/0/9/130969045/6627364.pdf
    • http://gubizuwa.donaldshoney.com/uploads/1/3/0/7/130776031/gapata-weganijisiru-ralimijifobev.pdf
    • http://files.boundlessyogastudio.com/uploads/1/3/1/3/131383651/dipisegafoxi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5466/0758/files/93618550938.pdf
    • https://cdn.shopify.com/s/files/1/0434/1520/8098/files/presentation_speech_example.pdf
    • https://cdn.shopify.com/s/files/1/0435/3048/5912/files/bijotuxulesukena.pdf
    • https://cdn.shopify.com/s/files/1/0439/8697/6926/files/65075204099.pdf
    • https://cdn.shopify.com/s/files/1/0427/8986/3580/files/mahindra_tractor_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/4633655903.pdf
    • https://cdn.shopify.com/s/files/1/0431/4418/3970/files/zuzenumake.pdf
    • https://cdn.shopify.com/s/files/1/0437/5805/9674/files/save_illustrator_smaller_size.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/85483270212.pdf
    • https://cdn.shopify.com/s/files/1/0437/0278/0057/files/atmega328_microcontroller_programming.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7134/files/77257715284.pdf
    • https://cdn.shopify.com/s/files/1/0432/8131/8056/files/bienes_y_servicios_con_tarifa_12.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_off00006337.bin
7054d46dcc86a8ea279597ce59fb3444e3ec5fea016f33fa53e5ff4577be5158		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6337 5500 bytes
font_01_sfnt_off000075ff.bin
139c29ac278571c65a9f1b1e467e3cea59f2558e8a0d7b81fd8820064aae095d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75FF 10300 bytes

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