Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a6162b280cbc8e0…

MALICIOUS

PDF

47.4 KB Created: 2020-03-26 13:05:17 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: e47cea6185e5a5d7cdbc7ff184398ec0 SHA-1: d718f0bb3fd24565d61318f562b763c40aa7ae4a SHA-256: 9a6162b280cbc8e04c823bf0a5a68acd52c50d6a4be3d373bcc5129f2fe3cbdd
136 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection tactic. The ML_NYX_PDF_MALICIOUS heuristic also flagged this document with high confidence. While no scripts were extracted, the sheer volume of external URLs points towards a malicious intent, likely to manipulate search engine results or lead users to compromised content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://hawgsmoke.net/uploads/1/3/0/2/130274330/130274330.html#escala+de+colores+rgb PDF link annotation
    • http://autumnmoonphotography.com/uploads/1/3/0/2/130273581/e21bc959b650631.pdfIn PDF document text
    • http://postmaster.dp-foto.ch/uploads/1/3/0/9/130969473/c24c80f5f1.pdfIn PDF document text
    • http://tirpsy.com/uploads/1/3/0/3/130313272/raselid.pdfIn PDF document text
    • http://nutritionunique2u.com/uploads/1/3/0/3/130323647/nonofonifij-busopuv.pdfIn PDF document text
    • http://behnkeinc.net/uploads/1/3/0/6/130604269/9746164.pdfIn PDF document text
    • http://chalkfund.com/uploads/1/3/0/3/130379138/1358198.pdfIn PDF document text
    • http://www.brukup.co.uk/uploads/1/3/0/5/130543272/nupalulejobamem_rokija_momurebasi_julebesimuze.pdfIn PDF document text
    • http://www.cpm-group.net/uploads/1/3/0/4/130476469/576477.pdfIn PDF document text
    • http://www.johnsonnation.org/uploads/1/3/0/3/130313383/vutaruvilaju_nimetafute_felitizalas_kodomejaf.pdfIn PDF document text
    • http://jakebrenneise.com/uploads/1/3/0/6/130603715/figutut-lanupavitisir-faregitetafup-fapogavuxi.pdfIn PDF document text
    • http://chantillytaxisedan.com/uploads/1/3/0/6/130621131/fatoloz-lolugerawokavu.pdfIn PDF document text
    • http://lovingcareministry.com/uploads/1/3/0/2/130272932/zezido-vodefeduko-fifutawovejeguz.pdfIn PDF document text
    • http://www.midwestcustomservicesofwisconsin.com/uploads/1/3/0/6/130604441/todozaxuzuru_turazenovoso_mesufagabovuwis.pdfIn PDF document text
    • http://avalonvending.org/uploads/1/3/0/7/130739655/musuvodusinomaweboxo.pdfIn PDF document text
    • http://brianjbishop.com/uploads/1/3/0/6/130604911/8375001.pdfIn PDF document text
    • http://thedc-org.pftsports.com/uploads/1/3/0/8/130814353/zodijewukorolu.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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000085e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E6 8688 bytes
SHA-256: 1966051f9dd49075fbaf1d278e59c86de949d2b3c362f9e1a85cecea7d7bf5d2
font_01_sfnt_off0000a565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA565 2600 bytes
SHA-256: 41d5c9cb4d60b7530e3cfd93a78efd430fe179aa57a8296e74fb8a971da4b0ee

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