Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e7aedcddb0bf729…

MALICIOUS

PDF

35.3 KB Created: 2020-05-17 15:27:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: a2c8334f586d4c3e6469f1ff837bb01c SHA-1: 0074006e04c3dd1e5ef51fb680b314ce31eea04c SHA-256: 8e7aedcddb0bf7294704d6a64d315371382dc85ade082441eb487ca3951cd527
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links pointing to other PDFs hosted on various domains, a technique commonly used for SEO poisoning or to redirect users to malicious content. The ML classifier strongly indicated maliciousness. The embedded URLs and the PDF_SEO_LINK_FARM heuristic confirm the intent to leverage a link farm for potential malicious redirection.

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://helpking.org/uploads/1/3/0/2/130289311/130289311.html#araldite+klear+epoxy+adhesive+data+sheet PDF link annotation
    • http://rainbowkaleki.org/uploads/1/3/0/7/130776878/sopipazezin.pdfIn PDF document text
    • http://wishesbrewtea.com/uploads/1/3/0/2/130289789/nokise_renom.pdfIn PDF document text
    • http://cumminsdesignstudio.com/uploads/1/3/1/1/131164016/nufikamuzemurun.pdfIn PDF document text
    • http://solarsevendesign.com/uploads/1/3/0/7/130739696/f47b1ba8.pdfIn PDF document text
    • http://dianaoancea.com/uploads/1/3/0/8/130813965/samatinedok.pdfIn PDF document text
    • http://lavelcustomcrowns.com/uploads/1/3/0/4/130488270/wokag.pdfIn PDF document text
    • http://zhzhgao.com/uploads/1/3/0/5/130540493/d245ad685b562f.pdfIn PDF document text
    • http://dogwalkersilford.com/uploads/1/3/0/5/130590122/nepunovijetufo.pdfIn PDF document text
    • http://emilybrobeck.com/uploads/1/3/0/2/130289719/jezezirikupopez_nasibem.pdfIn PDF document text
    • http://bellmateproperties.com/uploads/1/3/0/7/130740086/rubananimud.pdfIn PDF document text
    • http://stridersrunningblog.com/uploads/1/3/1/1/131164318/5947392.pdfIn PDF document text
    • http://maxdoraville.com/uploads/1/3/1/3/131384424/1648551.pdfIn PDF document text
    • http://friendsfeedingfriends-topsail.org/uploads/1/3/0/5/130589309/7354665.pdfIn PDF document text
    • http://weigh2success.com/uploads/1/3/1/6/131637881/dupatudaluw.pdfIn PDF document text
    • http://hesperiatowtrucks.com/uploads/1/3/1/6/131637562/bisukalemususujer.pdfIn PDF document text
    • http://vistamultifamily.com/uploads/1/3/0/6/130639325/vilopevul.pdfIn PDF document text
    • http://beautylifeandmommyhood.com/uploads/1/3/1/4/131483265/7685771.pdfIn PDF document text
    • http://homeandhouserefinishes.net/uploads/1/3/0/5/130538902/220906.pdfIn PDF document text
    • http://cityscopebl.com/uploads/1/3/0/7/130776739/c9471.pdfIn PDF document text
    • http://jmurphyproperties.com/uploads/1/3/0/8/130813780/240148.pdfIn PDF document text
    • http://keyslockout.com/uploads/1/3/1/3/131379031/tosujufavara-wutega-nefefiw-safimepokilu.pdfIn PDF document text
    • http://sazanpd.com/uploads/1/3/0/5/130539155/velejuk.pdfIn PDF document text
    • http://brightfloatpods.com/uploads/1/3/0/6/130620627/43e02cf.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
🗂 Part of campaign: emilybrobeck.com 3 samples

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_off00005dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCC 10308 bytes
SHA-256: d775cfa66760d607c63621baa57ed947c339c997edcac5f0ed158d073f3e3f74

Open this report in the interactive analyzer, or submit your own file for analysis.