Malicious PDF — malware analysis report

Static analysis result for SHA-256 5305d2af07988400…

MALICIOUS

PDF

46.0 KB Created: 2020-03-27 07:54:13 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: fe849b420a4ce233d4b85d824d57f6f2 SHA-1: 431c78b669280e15cedc36508ddfc2c3b6e77d2c SHA-256: 5305d2af079884007ba3702e9f92801a34e658c49f4181aa1a0f616eea678951
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The document body, though partially corrupted, contains text related to 'health informatics textbook solutions' and the authoring application 'wkhtmltopdf', suggesting a lure to potentially harmful content disguised as educational material. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://djsacademy.com/uploads/1/3/0/5/130550838/130550838.html#health+informatics+textbook+solutions PDF link annotation
    • http://www.montanafowlerart.com/uploads/1/3/0/4/130478163/9711634.pdfIn PDF document text
    • http://kylejustin.net/uploads/1/3/0/6/130621734/lukodunizal.pdfIn PDF document text
    • http://goodcamp.net/uploads/1/3/0/6/130620320/8f844196e1e4.pdfIn PDF document text
    • http://kanddrecovery.info/uploads/1/3/0/6/130620649/ketaxeba.pdfIn PDF document text
    • http://tsencheng.com/uploads/1/3/0/7/130740514/5526752.pdfIn PDF document text
    • http://haddensayersband.com/uploads/1/3/0/7/130775265/pedukoluxi-zeketad.pdfIn PDF document text
    • http://lytness.com/uploads/1/3/0/7/130739720/a70e7129e3f81b3.pdfIn PDF document text
    • http://sunsethollywood.com/uploads/1/3/0/2/130289220/7487880.pdfIn PDF document text
    • http://redroofexteriors.com/uploads/1/3/0/6/130621309/4526911.pdfIn PDF document text
    • http://stackism.com/uploads/1/3/1/0/131070456/738272.pdfIn PDF document text
    • http://pbyukon.synodnw.org/uploads/1/3/0/7/130775025/dupiwuk.pdfIn PDF document text
    • http://mastflutestudio.com/uploads/1/3/0/6/130604358/ranebobebedut_vilogugodepogen.pdfIn PDF document text
    • http://prestigeholdingllc.com/uploads/1/3/0/7/130775242/7128235.pdfIn PDF document text
    • http://www.britts-blog.com/uploads/1/3/0/8/130814043/3321916.pdfIn PDF document text
    • http://club37leadership.com/uploads/1/3/0/7/130740616/wikagemujujoju-ritipakosis.pdfIn PDF document text
    • http://gaymer.tv/uploads/1/3/0/5/130551186/5834649.pdfIn PDF document text
    • http://corporatelogoexpress.com/uploads/1/3/0/6/130621844/vaxoku.pdfIn PDF document text
    • http://www.clayclothmetalcraft.com/uploads/1/3/0/7/130776043/xulasi_jofazitag_jugaxipu_muritodeki.pdfIn PDF document text
    • http://allencnsltg.com/uploads/1/3/0/3/130379332/fapinavekezimon.pdfIn PDF document text
    • http://the-wild-moon.com/uploads/1/3/0/6/130604771/6d499d3151.pdfIn PDF document text
    • http://joshuaosagie.com/uploads/1/3/0/4/130489351/memadabavozigel.pdfIn PDF document text
    • http://hostmaster.besttravelmugs.co.uk/uploads/1/3/0/8/130814401/292d58cb2a8439.pdfIn PDF document text
    • http://hostmaster.russandhenshaw.com/uploads/1/3/0/6/130621180/wijab.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
🗂 Part of campaign: countryseasonsbnb.com 3 samples

Related samples 1

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A67 8168 bytes
SHA-256: b5b984efb85ab11144e056a70a1b264a58c520a198f7ab89dda77656e1382ed7

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