Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eef00dafdc2587c…

MALICIOUS

PDF

37.8 KB Created: 2020-05-13 17:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 245f88430f785aaacf42429cd6668d2e SHA-1: 1bf4a1250a380ad1e66026bd9ce664edf8039eba SHA-256: 0eef00dafdc2587c6b3eebf0f13205147614b95525bb3f7ee26c29123eea9bfc
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to other PDF files hosted on various domains. The document body mentions 'Antivirus smadav 2019 for pc', suggesting a lure to download or interact with malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, and 'PDF_RANDOM_URL_LINK' points to a specific suspicious URL, likely part of a campaign to distribute malware or phishing content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://twinelectronicz.com/uploads/1/3/1/1/131163691/131163691.html#antivirus+smadav+2019+for+pc
    • http://mywealthhabits.com/uploads/1/3/1/6/131636977/b8fd4ea9b85c81e.pdf
    • http://yphelpdesk.com/uploads/1/3/0/5/130589433/86dceadc04.pdf
    • http://leshowdugite.ca/uploads/1/3/0/4/130483592/wajixipolifaruzidezu.pdf
    • http://emilymullikindesign.com/uploads/1/3/0/3/130312914/79e7d5754ff.pdf
    • http://sarareads.com/uploads/1/3/0/2/130289204/bcdae9.pdf
    • http://lorlynconsulting.com/uploads/1/3/0/5/130590541/sowelaxed_neneta.pdf
    • http://ayambetutu-mbokluh.com/uploads/1/3/0/2/130288673/9769596.pdf
    • http://hopeforhemlocks.org/uploads/1/3/0/7/130775795/keridida.pdf
    • http://earth-ltd.com/uploads/1/3/0/2/130272474/2244203.pdf
    • http://getfidofitness.com/uploads/1/3/0/8/130873818/fenetebafewi-debut.pdf
    • http://dieterstaelens.be/uploads/1/3/1/4/131453747/02fd5fccc6f7.pdf
    • http://overbuiltunderrated.com/uploads/1/3/1/4/131453454/d39a15a69c01551.pdf
    • http://technopagan1108.com/uploads/1/3/1/1/131163737/kipamewisi.pdf
    • http://cityautotracy.com/uploads/1/3/0/6/130639941/2ca0cbd.pdf
    • http://newfaithapostolic.org/uploads/1/3/0/7/130775668/tevazogemodi-pobukenatudinik-mazejaja-bipizagobeva.pdf
    • http://janninenewmandesign.com/uploads/1/3/0/4/130435622/f2fc97.pdf
    • http://comofracasarenlosestadosunidos.com/uploads/1/3/1/4/131437370/rakativ.pdf
    • http://michellestevensphotography.com/uploads/1/3/0/6/130620849/tizukovizog_kosejof_junalewu_wewamaradib.pdf
    • http://whensheruns5.com/uploads/1/3/0/4/130476589/jezetewexavifev.pdf
    • http://supernoobgaming.org/uploads/1/3/0/2/130291809/xepapigilag-kijud-pixudiwatawe-zozuma.pdf
    • http://vishalupadhyay.com/uploads/1/3/0/9/130969829/fosaral-benore.pdf
    • http://lunalolasc.com/uploads/1/3/0/5/130544702/gofasirinetebuponaku.pdf
    • http://palletdaddyliquidation.com/uploads/1/3/0/4/130488779/7755851.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000681e.bin
d0bf9dad506f61923a17e2e33574cabbbdfe226d6c30064c0362b56275b1ac54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x681E 10224 bytes

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