Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf5d52f37707864…

MALICIOUS

PDF

36.7 KB Created: 2020-06-15 00:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 516205102b8deb461e0df9c637a07083 SHA-1: d383fa45fb9a888331647f3ce525c821e29e225a SHA-256: 8bf5d52f377078646ce37eaf6a9a51983228dff6a8091b9d53c69751d90d0fe1
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The document body, though heavily obfuscated, contains text related to a 'TV guide 60th anniversary' and references to 'wkhtmltopdf', suggesting a lure to generate traffic to these linked sites. The heuristic 'PDF_SEO_LINK_FARM' strongly indicates this malicious intent.

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://magetointerieurbouw.com/uploads/1/3/0/6/130603810/130603810.html#tv+guide+60th+anniversary PDF link annotation
    • http://beorganics.org/uploads/1/3/0/2/130291434/tabowilakozam.pdfIn PDF document text
    • http://bowsoverbros.com/uploads/1/3/0/3/130313376/vujazot.pdfIn PDF document text
    • http://ecoreflection.info/uploads/1/3/2/3/132303043/woretevuvofo_gibaludedepabez_pujetupan_lebegupap.pdfIn PDF document text
    • http://peacelovetruth.com/uploads/1/3/1/0/131071298/jevisizoga.pdfIn PDF document text
    • http://thenewschoolstudio.com/uploads/1/3/1/4/131437427/vezupolirefut-lisokajizinegud.pdfIn PDF document text
    • http://mail.yourimmobilia.de/uploads/1/3/0/5/130590163/8226029.pdfIn PDF document text
    • http://mta40.somekindofsimple.com/uploads/1/3/0/6/130621267/2045781.pdfIn PDF document text
    • http://vaarwelpaul.nl/uploads/1/3/0/7/130775478/duzexexejafatefit.pdfIn PDF document text
    • http://taxiairport.online/uploads/1/3/0/3/130312937/ditutodogimo-lowabefivu.pdfIn PDF document text
    • http://mailfilter.sry.com.tw/uploads/1/3/0/5/130551856/sipevivu_niruga_wuxafadaxoli.pdfIn PDF document text
    • http://74-123-77-53.mgwnet.com/uploads/1/3/0/5/130551764/7531458.pdfIn PDF document text
    • http://i-405corporatecenter.com/uploads/1/3/0/7/130775567/regowod.pdfIn PDF document text
    • http://easthavenrotary.org/uploads/1/2/9/4/129458896/129458896.html?d-In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://jobowinilu.files.wordpress.com/2020/06/29626770149.pdfIn PDF document text
    • https://xevubimeroz.files.wordpress.com/2020/06/tosuwuluxevoxa.pdfIn PDF document text
    • https://vegowukusa.files.wordpress.com/2020/06/61806871001.pdfIn PDF document text
    • https://xepagobe.files.wordpress.com/2020/06/1021228646.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
    • 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_off000063af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AF 10416 bytes
SHA-256: 248bf440db89e36c46064a8fa89296cd155eafea1066ae122560cf0e3b14b54a

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