Malicious PDF — malware analysis report

Static analysis result for SHA-256 c45a848edefcfcc9…

MALICIOUS

PDF

41.8 KB Created: 2020-03-10 04:22:28 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 942d8a85f6a02fbccd100218c7087b10 SHA-1: 645ef863a9e30cfb99486856e18a8495af920221 SHA-256: c45a848edefcfcc912e354a34de15f034544510d28923e07e9be8559fbf625fb
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, contains references to medical topics and the authoring application, which may serve as a lure. 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://parkertuthill.com/uploads/1/3/0/6/130604088/130604088.html#ischemic+vs+hemorrhagic+stroke+pathophysiology PDF link annotation
    • http://drsundeepsingh.com/uploads/1/3/0/3/130324011/zoraxak.pdfIn PDF document text
    • http://shopity.space/uploads/1/3/0/6/130639675/runejovexavan.pdfIn PDF document text
    • http://www.matrangakingwedding.com/uploads/1/3/0/6/130621100/dc28f2401298b.pdfIn PDF document text
    • http://michaelreichert.info/uploads/1/3/0/8/130814914/birajewoti.pdfIn PDF document text
    • http://www.greenlandhealthcare.com/uploads/1/3/0/7/130776100/e59939.pdfIn PDF document text
    • http://motortrainingtotaal.com/uploads/1/3/0/5/130590257/924167f38ce2e.pdfIn PDF document text
    • http://downriverkaraokeanddj.com/uploads/1/3/0/6/130639424/jurupagij.pdfIn PDF document text
    • http://michelleastentherapy.com/uploads/1/3/0/4/130483512/4990302.pdfIn PDF document text
    • http://jonathanfaber.com/uploads/1/3/0/4/130488073/girubilebulo.pdfIn PDF document text
    • http://mesawindshieldrepair.com/uploads/1/3/0/8/130813120/8294097.pdfIn PDF document text
    • http://e-learninganddesign.com/uploads/1/3/0/7/130740419/noratem.pdfIn PDF document text
    • http://mta-sts.mail.dressartnyc.com/uploads/1/3/0/6/130604445/2017502.pdfIn PDF document text
    • http://anitaleverarttherapist.com/uploads/1/3/0/4/130476229/vevuraxonu-woxijadugo-kanuw-sukidamok.pdfIn PDF document text
    • http://mosquitosaregone.com/uploads/1/3/0/6/130620689/butasowulitewug_lovorowogemow_makejow.pdfIn PDF document text
    • http://abstractfact.com/uploads/1/3/0/6/130620948/8a200634.pdfIn PDF document text
    • http://multifaithstorytelling.org/uploads/1/3/0/7/130775002/petoxuziranuk_jodavoneve_dagamowi.pdfIn PDF document text
    • http://d-jedi.com/uploads/1/3/0/7/130739852/2533403.pdfIn PDF document text
    • http://stonepinelabs.com/uploads/1/3/0/4/130488331/9912126.pdfIn PDF document text
    • http://doclipo.com/uploads/1/3/0/5/130590741/muxivag.pdfIn PDF document text
    • http://westernsierratelecom.com/uploads/1/3/0/9/130969701/nugoropebino.pdfIn PDF document text
    • http://www.middleclassmusings.com/uploads/1/3/0/6/130604789/3353757.pdfIn PDF document text
    • http://capowthetrainer.com/uploads/1/3/0/2/130274028/kovat.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: daytonarescuemission.org 4 samples

Related samples 2

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_off00007ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD4 7812 bytes
SHA-256: fa008809380822861a5b31c8b23e302134cb93a14d1225853d3db5cffae87d77

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