Malicious PDF — malware analysis report

Static analysis result for SHA-256 e591d70a8b408be3…

MALICIOUS

PDF

46.7 KB Created: 2020-03-29 07:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 244bae4a25388473573f6c98abbc70d3 SHA-1: c8a8759a8878433308994bcb09ee8946dd4fa53a SHA-256: e591d70a8b408be3788a7e10951740179e700bc9515ca0f87dba1f476914335d
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, many of which point to other PDF files hosted on various domains. The document body, though partially corrupted, includes a URL that appears to be part of a link farm strategy. This suggests the primary purpose is to redirect users to potentially malicious content or to manipulate search engine rankings. The ML classifier strongly indicated maliciousness.

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://cww60.bpmtc.com/uploads/1/3/1/1/131164205/131164205.html#que+funcion+cumplen+los+estomas+en+las+hojas+de+las+plantas
    • http://fromelsewhere.agency/uploads/1/3/0/2/130289283/tekovilut_bewogerefoduzut.pdf
    • http://ledgrowlightsformarijuana.org/uploads/1/3/0/4/130488914/3042257.pdf
    • http://pdxpersonalinjury.com/uploads/1/3/0/6/130621020/708385.pdf
    • http://casabahiahotelresort.com/uploads/1/3/1/0/131070231/704546faa2a8.pdf
    • http://precisiongroupllc.net/uploads/1/3/0/5/130544541/891d0165009a375.pdf
    • http://life9rescue.org/uploads/1/3/0/4/130488158/bosiborede-lijiwap.pdf
    • http://rehabrealestate.org/uploads/1/3/0/2/130288661/4701056.pdf
    • http://fairingprices.com/uploads/1/3/0/7/130740441/satanisawanikegova.pdf
    • http://mgriffithdesign.com/uploads/1/3/0/6/130639764/4003121.pdf
    • http://alimark.com/uploads/1/3/0/5/130589423/5618098.pdf
    • http://delliefure.co.uk/uploads/1/3/0/6/130621918/lujipo.pdf
    • http://miss-america-protest.com/uploads/1/3/0/6/130620694/bovepuxinesir.pdf
    • http://www.almatyescort.com/uploads/1/3/0/6/130620159/tasutat_bobezodakaleb_bufoveborip_jasavomojoxe.pdf
    • http://cookeryacademy.net/uploads/1/3/0/5/130551106/227569.pdf
    • http://micropapillarybreastcancer.org/uploads/1/3/0/7/130739129/30e00fa69d.pdf
    • http://www.chaldeanyouthcamp.org/uploads/1/3/0/4/130435986/votazupijowigokiv.pdf
    • http://holy-post.net/uploads/1/3/0/3/130324170/1280526.pdf
    • http://aaroncharlesg.com/uploads/1/3/0/5/130539319/054f2f0.pdf
    • http://bernardobellostudio.com/uploads/1/3/0/4/130483459/77eb3999c2aa.pdf
    • http://rachelbethyoga.com/uploads/1/3/0/5/130539849/zawirijipefu.pdf
    • http://citizenimmigrant.com/uploads/1/3/0/7/130775088/nipijogaxituvok.pdf
    • http://mta-sts.mail.gregharveygallery.com/uploads/1/3/0/6/130621664/xatiwavok.pdf
    • http://sponsorforhire.com/uploads/1/3/1/4/131438684/0f283592690178.pdf
    • http://sponsorforhire.com/uploads/1/3/1/4/131438684/0f283592
    • 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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c7f.bin
09fab53f7f7cd100eea152ac8c16e4ddf7dfafc374e7e7c474082ebae93cd090		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C7F 8236 bytes

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