Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd8273627f77b717…

MALICIOUS

PDF

37.2 KB Created: 2020-05-15 01:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: a15f191712012a826bacfb8873d46dff SHA-1: 17ce2429728c60acfa6ae30b4f10e140b3db5d35 SHA-256: dd8273627f77b717ee16d7fd9c33eef808bc3466e2ab8876ae47a01843a16a54
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated and point to PDF files. One specific link, 'http://eastnobletrack.com/uploads/1/3/1/8/131856160/131856160.html#skype+for+business+2015+trial', suggests a lure related to software trials. The ML classifier strongly indicates maliciousness, and the overall structure points to a link farm designed to distribute malware or phishing content.

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://eastnobletrack.com/uploads/1/3/1/8/131856160/131856160.html#skype+for+business+2015+trial PDF link annotation
    • http://traavers.com/uploads/1/3/0/7/130739754/nasuvigumamik.pdfIn PDF document text
    • http://jonesfamilyrvtrip.com/uploads/1/3/0/9/130968926/kojavuranupesut.pdfIn PDF document text
    • http://smcconsulting.fr/uploads/1/3/1/4/131409926/voxij-memoma.pdfIn PDF document text
    • http://mbconsultgroup.com/uploads/1/3/0/4/130435784/rifiteliko.pdfIn PDF document text
    • http://owens-for-mayor.com/uploads/1/3/0/6/130639407/sidar-gulajudekufuvu.pdfIn PDF document text
    • http://ehswildcatfootball.com/uploads/1/3/0/8/130873863/wojebomar_wikavisowo_neres_visosaxuvis.pdfIn PDF document text
    • http://gamechanger-media.com/uploads/1/3/0/7/130739919/6682459.pdfIn PDF document text
    • http://moneymakersmethods.com/uploads/1/3/1/3/131379991/9ba43e2e305.pdfIn PDF document text
    • http://drrodchiropractic.com/uploads/1/3/0/7/130776264/dibiki_nebuloliropoju_raronubi.pdfIn PDF document text
    • http://exclusiveaircraftinteriors.com/uploads/1/3/0/7/130740113/jireja-bisufedivojiro-silus-vinugotupiro.pdfIn PDF document text
    • http://theheardoc.com/uploads/1/3/1/3/131379792/vorov.pdfIn PDF document text
    • http://blockmountings.com/uploads/1/3/0/2/130289385/nuralipenujo_mavegafigaw.pdfIn PDF document text
    • http://maywayhoo.com/uploads/1/3/0/8/130874339/5437009.pdfIn PDF document text
    • http://brilliant.domains/uploads/1/3/1/4/131438289/petefefolisa-biwenik-xazojudowun.pdfIn PDF document text
    • http://becfordyce.com/uploads/1/3/0/5/130589385/wetafogupobojivezo.pdfIn PDF document text
    • http://alessandrasantiago.com/uploads/1/3/0/3/130379804/9591791.pdfIn PDF document text
    • http://adamphx.com/uploads/1/3/0/7/130740133/1179217.pdfIn PDF document text
    • http://professorsjrichards.com/uploads/1/3/0/2/130271184/bimutu.pdfIn PDF document text
    • http://dignifieddesignsusa.com/uploads/1/3/0/8/130874237/dozodivebu.pdfIn PDF document text
    • http://owcoatings.com/uploads/1/3/0/5/130545742/zemovup-pesetal-sigemozasaxuf-juxel.pdfIn PDF document text
    • http://bertspizzeria.com/uploads/1/3/0/5/130539403/8568320.pdfIn PDF document text
    • http://jaelanico.com/uploads/1/3/1/3/131379991/301f8b2b6f9e.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 8

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_off0000651b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x651B 10400 bytes
SHA-256: 8a0fed1bb1a6ba2e25b6991f83f31ca18ccd674cc678fc65c840cd53642f8e67

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