Malicious PDF — malware analysis report

Static analysis result for SHA-256 592664fd7f329ab1…

MALICIOUS

PDF

46.5 KB Created: 2020-04-20 01:38:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-10
MD5: 3d48c04442f8dffb98e00a3e74a61c6e SHA-1: 2280085e0452506cd5546d52f16392f043356525 SHA-256: 592664fd7f329ab17c0e8fa629201c7147aa163d17353a4625a90723dbbf9eaa
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which are structured as SEO-optimized PDF lures. The document body, though partially corrupted, suggests a lure related to 'Antibiotic resistant bacteria lab answers'. The primary attack pattern involves directing users to a network of suspicious websites, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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 http://vmcc-solutions.com/uploads/1/3/0/2/130287462/130287462.html#antibiotic+resistant+bacteria+lab+answers PDF link annotation
    • http://hthmconsulting.com/uploads/1/3/0/2/130272432/0bb1a7930.pdfIn PDF document text
    • http://shannon-simpson.com/uploads/1/3/0/9/130969624/xixituzomut_momolutiner_jamazanaviw_nejixuraxavutem.pdfIn PDF document text
    • http://pandeliascanaryyellowcompany.com/uploads/1/3/0/5/130546538/makaribulusat.pdfIn PDF document text
    • http://outlawradiofm.com/uploads/1/3/0/2/130289625/sanowoti.pdfIn PDF document text
    • http://jetcricketline.com/uploads/1/3/0/7/130738893/2c0b119911.pdfIn PDF document text
    • http://slipublishing.com/uploads/1/3/0/6/130622012/5707648.pdfIn PDF document text
    • http://buybx3outdoors.com/uploads/1/3/0/2/130289515/gafixejiju.pdfIn PDF document text
    • http://investamherst.com/uploads/1/3/1/4/131482853/2467337.pdfIn PDF document text
    • http://hey-loretta.com/uploads/1/3/0/6/130639747/6431126.pdfIn PDF document text
    • http://vacationdealsforyou.com/uploads/1/3/0/3/130313494/nasiviwo_dagajuxoxe_xabadok_gipidadasusa.pdfIn PDF document text
    • http://hairnailsandmakeupbyjenny.com/uploads/1/3/0/2/130273843/gapekov.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D64 1700 bytes
SHA-256: e3a9e11047269c7cf4a6fbb51afef18afbda0372a11e4498b45861fc2d1374b4
font_01_sfnt_off0000757c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x757C 8720 bytes
SHA-256: 54b55177e7a10b0f987ad44701f5ab9ea4a07537179bb17e1d88e968a8fe50f2
font_02_sfnt_off000096b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96B9 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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