Malicious PDF — malware analysis report

Static analysis result for SHA-256 55da926c8037a31e…

MALICIOUS

PDF

37.7 KB Created: 2020-05-22 09:11:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 416a1938fd454adfefd9d9f08513860c SHA-1: 0b49ef5b0a3359ab9833fc3bf0f1be9ee6459484 SHA-256: 55da926c8037a31e488e35e7a4ce42205d6d12d4a69fab2ec6b63c78d7fd44cb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, a technique often used for SEO poisoning to drive traffic to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, indicating a likely attempt to manipulate search engine results or distribute further malware. The document body itself is largely unreadable, but the presence of numerous URLs points to a content-distribution or redirection attack.

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://c8hrw.slpny.com/uploads/1/3/1/1/131164447/131164447.html#the+balanced+scorecard+kaplan+pdf+fr PDF link annotation
    • http://travelwithsaranewbury.com/uploads/1/3/1/4/131408364/pemedawu_setidegufuba_sebitof_kipefixizile.pdfIn PDF document text
    • http://venugousa.com/uploads/1/3/0/6/130604220/limero_diwojif.pdfIn PDF document text
    • http://thesunnywindow.net/uploads/1/3/0/5/130588307/db43ba1f65.pdfIn PDF document text
    • http://toddjlowe.com/uploads/1/3/0/5/130588405/sufedo_guzijekukowiwuj.pdfIn PDF document text
    • http://starsforabettertomorrow.org/uploads/1/3/1/4/131454850/8374864.pdfIn PDF document text
    • http://dmccleaningservices.net/uploads/1/3/0/4/130488891/2145683.pdfIn PDF document text
    • http://blackpowerss.com/uploads/1/3/0/5/130590321/e3089f5b9f.pdfIn PDF document text
    • http://mrshalford.com/uploads/1/3/0/3/130313088/7211518.pdfIn PDF document text
    • http://shippscornertrainingfacility.com/uploads/1/3/0/5/130590366/f0ca9e2.pdfIn PDF document text
    • http://leadsforyou.biz/uploads/1/3/1/3/131384618/jikagotuzabi.pdfIn PDF document text
    • http://sltahoehabitat.com/uploads/1/3/0/4/130489898/bitodekus.pdfIn PDF document text
    • http://codaergosum.com/uploads/1/3/1/4/131455247/4553557.pdfIn PDF document text
    • http://akidsplacedaycare.net/uploads/1/3/1/4/131483361/8864094.pdfIn PDF document text
    • http://thegildedcorner.com/uploads/1/3/0/7/130739686/sokaji.pdfIn PDF document text
    • http://sofiechapmanbuyerschoice.com/uploads/1/3/0/4/130488308/1187451.pdfIn PDF document text
    • http://arlenautocollision.com/uploads/1/3/0/9/130969921/bab1909cfae.pdfIn PDF document text
    • http://wedoprofessionalindemnityinsurance.com/uploads/1/3/1/4/131482939/rebetuxekupined-pomopos.pdfIn PDF document text
    • http://sanctuarycowork.com/uploads/1/3/0/3/130323324/5518245.pdfIn PDF document text
    • http://teamreact.net/uploads/1/3/1/4/131413550/cc30fbd4ebf3.pdfIn PDF document text
    • http://cookmetaradiddles.com/uploads/1/3/1/0/131069860/nojokovapupavi.pdfIn PDF document text
    • http://siawebllc.com/uploads/1/3/0/6/130620505/3408113.pdfIn PDF document text
    • http://serviertransformationdigital.com/uploads/1/3/0/2/130287919/fasin-foret-foweta.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 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_off00006781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6781 10344 bytes
SHA-256: e3e56ea02942b217802f43b48996a8ebd475f3aa575124f7bca510b0e999f8c0

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