Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7a545d9bb9cc48b…

MALICIOUS

PDF

38.2 KB Created: 2020-05-17 06:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: b8ed4297b7a48ac4fe87dc1a10956f86 SHA-1: 3c48a698712902fed6c03ec67fef074de5fcb428 SHA-256: e7a545d9bb9cc48b1a93165d8a5e7303844056098a8b35ddd7693a38bea8f46b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, a technique often used to distribute malware or phish for credentials. The PDF_SEO_LINK_FARM heuristic indicates a deliberate attempt to create a link farm, likely to distribute malicious content or drive traffic to compromised sites. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of this document. No scripts were extracted, but the extensive link farm suggests a delivery mechanism for further malicious payloads.

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://nfpboardwisdom.com/uploads/1/3/0/2/130272918/130272918.html#azure+stack+hci+deployment+guide PDF link annotation
    • http://afcsnell.org/uploads/1/3/1/4/131408224/ketejugu.pdfIn PDF document text
    • http://socalmrm.com/uploads/1/3/0/7/130739712/losedubiremisonebom.pdfIn PDF document text
    • http://umorebrand.shop/uploads/1/3/0/3/130379696/kefazorojiriwefuw.pdfIn PDF document text
    • http://newlineofficefurniture.com/uploads/1/3/0/7/130739619/jefirib.pdfIn PDF document text
    • http://kevinachen.com/uploads/1/3/1/3/131384298/7700167.pdfIn PDF document text
    • http://aimmos.org/uploads/1/3/0/8/130874671/viwiwo.pdfIn PDF document text
    • http://larsonip.com/uploads/1/3/0/7/130739002/monoxuj.pdfIn PDF document text
    • http://marcoscustomcabinetry.com/uploads/1/3/0/2/130288448/jijepuxuvufejamu.pdfIn PDF document text
    • http://amazecareers.com/uploads/1/3/1/4/131482933/pegijugix_katigik_puxuze.pdfIn PDF document text
    • http://sahalla.com/uploads/1/3/1/4/131452825/kiludesikuta.pdfIn PDF document text
    • http://eggyums.com/uploads/1/3/0/4/130489149/vejadexogot.pdfIn PDF document text
    • http://castilloconsultingpartners.com/uploads/1/3/0/7/130740022/vilomaxir.pdfIn PDF document text
    • http://rainerhaycraft.com/uploads/1/3/1/4/131406441/22f74a1e.pdfIn PDF document text
    • http://amiture2master.com/uploads/1/3/0/6/130620230/rudakegatalusin.pdfIn PDF document text
    • http://deadballapparel.com/uploads/1/3/1/3/131398323/bae5af475.pdfIn PDF document text
    • http://fijamulder.com/uploads/1/3/0/9/130969406/maratilibajanap_dutusag.pdfIn PDF document text
    • http://designsivyou.com/uploads/1/3/0/7/130739129/8460568.pdfIn PDF document text
    • http://tedxkarlovackagimnazija.com/uploads/1/3/0/5/130590279/21d26d35d59.pdfIn PDF document text
    • http://valuedentalcarolinas.net/uploads/1/3/1/3/131380894/b2701baf6f44e.pdfIn PDF document text
    • http://landsofparadise.us/uploads/1/3/0/2/130273803/21c67721a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 4

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_off00006b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B76 9876 bytes
SHA-256: aba1a82b42dd0e6ac2b483b80d89a0ee70aa1e762199bdd938b50cfe5aaf4093

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