Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed9a989e488c73b…

MALICIOUS

PDF

46.1 KB Created: 2020-03-11 08:43:45 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 6da4e8c25c84c80fdaeeeb5de5db54d6 SHA-1: ae8e873a91815b07fa69ecce5d9da7dc9ab8d83e SHA-256: 7ed9a989e488c73bfc207666f094288715fefc534c0039fdddbe1e007ae6195e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to other PDF files with numeric slugs. This behavior is indicative of a link farm or SEO manipulation tactic, potentially used to host malicious content or distribute malware. The ML classifier also strongly flagged this PDF as malicious.

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://feilvbinbaijialemianfeishiwan.br3h.com/uploads/1/3/0/3/130324324/130324324.html#esl+writing+worksheets+intermediate PDF link annotation
    • http://mysimplysouthernhome.com/uploads/1/3/0/7/130738972/wolafasa_tasun_jusuwidava_fuwevanivu.pdfIn PDF document text
    • http://bridesmaiddressesnewhampshire.com/uploads/1/3/0/5/130551876/b6dbada9f.pdfIn PDF document text
    • http://kg4hbn.com/uploads/1/3/0/6/130620290/3843425.pdfIn PDF document text
    • http://movecomputing.net/uploads/1/3/0/7/130775465/nepufun.pdfIn PDF document text
    • http://carmendaughertyphotography.com/uploads/1/3/0/6/130605448/vopona.pdfIn PDF document text
    • http://carterskennel.com/uploads/1/3/0/5/130541131/nosojetufini.pdfIn PDF document text
    • http://www.allenfoundationrepairpros.com/uploads/1/3/0/9/130969594/sobeze_moxetosogogide.pdfIn PDF document text
    • http://ammaartdebienetre.com/uploads/1/3/0/4/130476427/lamejigi_nivabimuvidudut_rolifesusosa_pabum.pdfIn PDF document text
    • http://faithsuite.org/uploads/1/3/0/7/130776220/2206625.pdfIn PDF document text
    • http://www.clonmelhillwalking.org/uploads/1/3/0/8/130874016/tewajifidi.pdfIn PDF document text
    • http://alangelfand.com/uploads/1/3/0/6/130605338/kegokeleti_lusez_mefoxoxirabeg_fumamo.pdfIn PDF document text
    • http://brightlightconstructionllc.com/uploads/1/3/0/6/130621772/462884.pdfIn PDF document text
    • http://redriverrolloff.com/uploads/1/3/0/8/130814329/lirugabun.pdfIn PDF document text
    • http://www.rayraypainting.com/uploads/1/3/0/8/130874498/e211b.pdfIn PDF document text
    • http://wsbwoffice.com/uploads/1/3/0/5/130543685/736cf.pdfIn PDF document text
    • http://smallwar.studio/uploads/1/3/0/8/130815726/8917838.pdfIn PDF document text
    • http://www.jaketaz.net/uploads/1/3/0/8/130814749/9979056.pdfIn PDF document text
    • http://ic1love.com/uploads/1/3/0/7/130775551/joneguwogezejizopod.pdfIn PDF document text
    • http://shaun.elemental-consulting.net/uploads/1/3/0/6/130620353/rogezum.pdfIn PDF document text
    • http://www.lifeoflekker.com/uploads/1/3/0/6/130620494/6088929.pdfIn PDF document text
    • http://mingaretreatcenter.org/uploads/1/3/0/3/130323488/7f6990.pdfIn PDF document text
    • http://choosingus.co/uploads/1/3/0/7/130738781/sizixekezuzat.pdfIn PDF document text
    • http://schmittsanimalhospital.net/uploads/1/3/0/4/130435679/6971686.pdfIn PDF document text
    • http://mikelindenthal.com/uploads/1/3/0/8/130813557/637e5e.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

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_off000089b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B8 8048 bytes
SHA-256: 9b180ef85cc3233599b4d403122622d6d6482d115277a865271fad0a0695957c

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