Malicious PDF — malware analysis report

Static analysis result for SHA-256 923a34d86aebce2a…

MALICIOUS

PDF

68.7 KB Created: 2021-02-27 00:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: b34f2aeb25496af4d4bcfd43c9b96e41 SHA-1: 4401fa5dcb19e60bafba0e9226924884d5fa6a67 SHA-256: 923a34d86aebce2a627a9decc314ec4d66e49bdad9bed13fbaaff24433d3c8fa
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, indicating a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests an attempt to direct the user to potentially harmful content. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://fokemale.ru/aws?utm_term=gba+sp+%2528ags-101%2529+backlit+lcd+screen PDF link annotation
    • https://kofetasug.weebly.com/uploads/1/3/0/8/130874362/3d36b3b11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421050/normal_5fd78fb99645d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426262/normal_601d2b4907512.pdfIn PDF document text
    • http://tukazijib.22web.org/9521989220.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466173/normal_5fe9f956738f7.pdfIn PDF document text
    • https://newavutija.weebly.com/uploads/1/3/1/8/131871734/848873c.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/nuvukaxogudadoloseveropis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469104/normal_5fdbce2413b73.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/micro_expressions_test_ekman.pdfIn PDF document text
    • https://jinimajaloxole.weebly.com/uploads/1/3/5/3/135314869/8541774.pdfIn PDF document text
    • https://kizifafub.weebly.com/uploads/1/3/4/7/134714450/burapunewa.pdfIn PDF document text
    • http://futubog.22web.org/62301721315.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nolusiwafaki.epizy.com/62971157662.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/karcher_pressure_washer_lance_connector.pdfIn PDF document text
    • http://wulisafule.epizy.com/a_levels_chemistry.pdfIn PDF document text
    • http://varoniwarovez.rf.gd/a_b_c_d_full_form.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/xikovitifapolefigilo.pdfIn PDF document text
    • http://tatasuvuputo.epizy.com/goudy_italic_font_free.pdfIn PDF document text
    • http://nujunawefati.epizy.com/vomemelaxumemedir.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFF 5856 bytes
SHA-256: fac128dc1652ffec60b78d298c163c849c553d8fdae63e34e13f033ff1935396
font_01_sfnt_off0000e21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21C 10276 bytes
SHA-256: bd7842ce286361696ac8a2a9c5c718f95e32ebe5f106d16ecf7a1d985195487c

Open this report in the interactive analyzer, or submit your own file for analysis.